No water changes?

[Sigmund]

If I had a 400 gallon tank, probably wouldn’t love doing water changes either. But I do not understand this continued goal to manage tanks without water changes? I have 3 tanks, 125, 65, 20 and do weekly changes. Other than salinity, I probably check parameters once a year, other than AFR do not dose anything. Always just seemed easier to me to just do quality water changes, then constantly test water, and try to chase parameters ghat I can achieve with just maintenance. For the record, do not have acros, but basically everything else. Guess it just where u want to spend your time. To each their own, but then I usually think I am right. Not a great trait of mine!

 

[Ocean’s Piece]

I created a thread a while back that exploded. Here’s a wealth of information here with a bunch of people sharing their opinions, conventional and controversial, on why or why not to do water changes. Let’s just say, I can’t talk about water changes on here anymore lol. Hope this helps.

Do you do water changes?

I do small 5 to 10% water changes weekly (if I have to miss one I don’t sweat it). I dose All for Reef every day and a couple drops of iodide and a couple drops of Ferrion on Monday and Thursday. Started NP-Balance at .5 ml a day to see if it helps keep my phos and nitrate at my normal levels...

www.reef2reef.com

 

[Saltyanimals]

I'm in the same boat of trying NOT to do WC if I can take care of the water I have. I actually enjoyed the WC when I had a smaller tank. A simple 5G bucket is easy to mix and perform. Even 2 buckets. However once you get to a med-large tank, the amount of WC to actually affect change goes much higher thus alot more difficult. My medium 180g + sump means a simple min 10% equates to 18+ gallons which now becomes a chore that will take hours. And 10% really doesn't move the needle much in terms of benefit, so I reverted to taking care of the water instead.

I do CaRX reactor so that gives me the core and I dose trace elements weekly. That's it. Test water probably monthly on a mix reef - SPS leaning. Took me a bit while the tank matures and will naturally balance as things stabilize and things settle down. However I will do ICP twice a year to make sure things stay in check. This is a small price and effort compared to doing WC to make sure I at least monitor my laziness.

 

[Timfish]

You can't measure the microbial stuff or the different types of DOC in your system. The composition of both has a profound influence on the health of your corals. Corals, sponges and algae are all messing with these, and vise versa. DOing water changes reduces both the good types and bad types together and facilitates corals in maintining the stuff they want. If your intention is to maintian your system and corals for it's/their normal life expectancies I would say water changes are essential. Here's a data bomb if your interested in:

"Coral Reefs in the Microbial Seas" This video compliments Rohwer's book of the same title (Paper back is ~$20, Kindle is ~$10), both deal with the conflicting roles of the different types of DOC in reef ecosystems. While there is overlap bewteen his book and the video both have information not covered by the other and together give a broader view of the complex relationships found in reef ecosystems

Changing Seas - Mysterious Microbes

Nitrogen cycling in hte coral holobiont

BActeria and Sponges

Maintenance of Coral Reef Health (refferences at the end)

Optical Feedback Loop in Colorful Coral Bleaching

Richard Ross What's up with phosphate"

Indirect effects of algae on coral: algae‐mediated, microbe‐induced coral mortality

Error - Cookies Turned Off

onlinelibrary.wiley.com

Influence of coral and algal exudates on microbially mediated reef metabolism.
Coral DOC improves oxygen (autotrophy), algae DOC reduces oxygen (heterotrophy).

Influence of coral and algal exudates on microbially mediated reef metabolism

Benthic primary producers in tropical reef ecosystems can alter biogeochemical cycling and microbial processes in the surrounding seawater. In order to quantify these influences, we measured rates of photosynthesis, respiration, and dissolved organic carbon (DOC) exudate release by the dominant...

peerj.com

Role of elevated organic carbon levels and microbial activity in coral mortality

http://www.int-res.com/articles/meps2006/314/m314p119.pdf

Effects of Coral Reef Benthic Primary Producers on Dissolved Organic Carbon and Microbial Activity
Algae releases significantly more DOC into the water than coral.

Effects of Coral Reef Benthic Primary Producers on Dissolved Organic Carbon and Microbial Activity

Benthic primary producers in marine ecosystems may significantly alter biogeochemical cycling and microbial processes in their surrounding environment. To examine these interactions, we studied dissolved organic matter release by dominant benthic taxa and subsequent microbial remineralization in...

journals.plos.org

Pathologies and mortality rates caused by organic carbon and nutrient stressors in three Caribbean coral species.
Starch and sugars (doc) caused coral death but not high nitrates, phosphates or ammonium.

http://www.int-res.com/articles/meps2005/294/m294p173.pdf

Visualization of oxygen distribution patterns caused by coral and algae

Visualization of oxygen distribution patterns caused by coral and algae

Planar optodes were used to visualize oxygen distribution patterns associated with a coral reef associated green algae (Chaetomorpha sp.) and a hermatypic coral (Favia sp.) separately, as standalone organisms, and placed in close proximity mimicking coral-algal interactions. Oxygen patterns were...

peerj.com

Biological oxygen demand optode analysis of coral reef-associated microbial communities exposed to algal exudates
Exposure to exudates derived from turf algae stimulated higher oxygen drawdown by the coral-associated bacteria.

Biological oxygen demand optode analysis of coral reef-associated microbial communities exposed to algal exudates

Algae-derived dissolved organic matter has been hypothesized to induce mortality of reef building corals. One proposed killing mechanism is a zone of hypoxia created by rapidly growing microbes. To investigate this hypothesis, biological oxygen demand ...

www.ncbi.nlm.nih.gov

Microbial ecology: Algae feed a shift on coral reefs

Microbial ecology: Algae feed a shift on coral reefs - Nature Microbiology

Human pressures on coral reefs are giving macroalgae a competitive advantage over reef-building corals. These algae support larger, and potentially pathogenic, microbial populations that are metabolically primed for less-efficient, yet faster, carbohydrate remineralization, perpetuating a...

www.nature.com

Coral and macroalgal exudates vary in neutral sugar composition and differentially enrich reef bacterioplankton lineages.

Coral and macroalgal exudates vary in neutral sugar composition and differentially enrich reef bacterioplankton lineages - PubMed

Increasing algal cover on tropical reefs worldwide may be maintained through feedbacks whereby algae outcompete coral by altering microbial activity. We hypothesized that algae and coral release compositionally distinct exudates that differentially alter bacterioplankton growth and community...

www.ncbi.nlm.nih.gov

Sugar enrichment provides evidence for a role of nitrogen fixation in coral bleaching

Error - Cookies Turned Off

onlinelibrary.wiley.com

Elevated ammonium delays the impairment of the coral-dinoflagellate symbiosis during labile carbon pollution
(here's an argument for maintaining heavy fish loads if you're carbon dosing)

Elevated ammonium delays the impairment of the coral-dinoflagellate symbiosis during labile carbon pollution

Labile dissolved organic carbon (DOC) is a major pollutant in coastal marine environments affected by anthropogenic impacts, and may significantly con…

www.sciencedirect.com

Excess labile carbon promotes the expression of virulence factors in coral reef bacterioplankton

Excess labile carbon promotes the expression of virulence factors in coral reef bacterioplankton - The ISME Journal

Coastal pollution and algal cover are increasing on many coral reefs, resulting in higher dissolved organic carbon (DOC) concentrations. High DOC concentrations strongly affect microbial activity in reef waters and select for copiotrophic, often potentially virulent microbial populations. High...

www.nature.com

Unseen players shape benthic competition on coral reefs.

Unseen players shape benthic competition on coral reefs - PubMed

Recent work has shown that hydrophilic and hydrophobic organic matter (OM) from algae disrupts the function of the coral holobiont and promotes the invasion of opportunistic pathogens, leading to coral morbidity and mortality. Here we refer to these dynamics as the (3)DAM [dissolved organic...

www.ncbi.nlm.nih.gov

Allelochemicals Produced by Brown Macroalgae of the Lobophora Genus Are Active against Coral Larvae and Associated Bacteria, Supporting Pathogenic Shifts to Vibrio Dominance.

Allelochemicals Produced by Brown Macroalgae of the Lobophora Genus Are Active against Coral Larvae and Associated Bacteria, Supporting Pathogenic Shifts to Vibrio Dominance - PubMed

Diverse microbial communities associate with coral tissues and mucus, providing important protective and nutritional services, but once disturbed, the microbial equilibrium may shift from a beneficial state to one that is detrimental or pathogenic. Macroalgae (e.g., seaweeds) can physically and...

www.ncbi.nlm.nih.gov

Macroalgae decrease growth and alter microbial community structure of the reef-building coral, Porites astreoides.

Macroalgae decrease growth and alter microbial community structure of the reef-building coral, Porites astreoides - PubMed

With the continued and unprecedented decline of coral reefs worldwide, evaluating the factors that contribute to coral demise is of critical importance. As coral cover declines, macroalgae are becoming more common on tropical reefs. Interactions between these macroalgae and corals may alter the...

www.ncbi.nlm.nih.gov

Macroalgal extracts induce bacterial assemblage shifts and sublethal tissue stress in Caribbean corals.

Macroalgal extracts induce bacterial assemblage shifts and sublethal tissue stress in Caribbean corals - PubMed

Benthic macroalgae can be abundant on present-day coral reefs, especially where rates of herbivory are low and/or dissolved nutrients are high. This study investigated the impact of macroalgal extracts on both coral-associated bacterial assemblages and sublethal stress response of corals. Crude...

www.ncbi.nlm.nih.gov

Biophysical and physiological processes causing oxygen loss from coral reefs.

https://elifesciences.org/articles/49114.pdf

Global microbialization of coral reefs
DDAM Proven

Global microbialization of coral reefs - Nature Microbiology

Analysis of 60 sites in three ocean basins suggests that overgrowth of fleshy algae on coral reefs supports higher microbial abundances dominated by copiotrophic, potentially pathogenic bacteria via the provision of dissolved inorganic carbon.

www.nature.com

Coral Reef Microorganisms in a Changing Climate, Fig 3

Coral Reef Microorganisms in a Changing Climate

Coral reefs are one of the most diverse and productive ecosystems on the planet, yet they have suffered tremendous losses due to anthropogenic disturbances and are predicted to be one of the most adversely affected habitats under future climate change ...

www.ncbi.nlm.nih.gov

Ecosystem Microbiology of Coral Reefs: Linking Genomic, Metabolomic, and Biogeochemical Dynamics from Animal Symbioses to Reefscape Processes

https://msystems.asm.org/content/msys/3/2/e00162-17.full.pdf

Because sponges are essential players in the carbon, nitrogen and phosphorus cycle(s) on reefs here's some links to research done with them.

Element cycling on tropical coral reefs.
This is Jasper de Geoij's ground breaking research on reef sponges. (The introduction is in Dutch but the content is in English.)

https://www.rug.nl/research/portal/files/14555035/13completethesis.pdf

Sponge symbionts and the marine P cycle

Sponge symbionts and the marine P cycle

Marine sponges are ubiquitous colonizers of shallow, clear-water environments in the oceans (1, 2). Sponges have emerged as significant mediators of biogeochemical fluxes in coastal zones by virtue of respiring organic matter and facilitating both the consumption and release of nutrients (3, 4)...

www.pnas.org

Phosphorus sequestration in the form of polyphosphate by microbial symbionts in marine sponges

Phosphorus sequestration in the form of polyphosphate by microbial symbionts in marine sponges

Coral reefs are highly productive ecosystems that raise a conundrum called “Darwin’s paradox”: How can high production flourish in low-nutrient conditions? We show here that in three abundant Caribbean sponges, the granules that have been commonly observed in sponge tissue for decades are...

www.pnas.org

Differential recycling of coral and algal dissolved organic matter via the sponge loop.
Sponges treat DOC from algae differently than DOC from corals

Error - Cookies Turned Off

besjournals.onlinelibrary.wiley.com

Surviving in a Marine Desert The Sponge Loop Retains Resources Within Coral Reefs
Dissolved organic carbon and nitrogen are quickly processed by sponges and released back into the reef food web in hours as carbon and nitrogen rich detritus.

(PDF) 2013 deGoeij Science Sponge loop

PDF | On Jun 23, 2015, Jasper M de Goeij and others published 2013 deGoeij Science Sponge loop | Find, read and cite all the research you need on ResearchGate

www.researchgate.net

Natural Diet of Coral-Excavating Sponges Consists Mainly of Dissolved Organic Carbon (DOC)

Natural Diet of Coral-Excavating Sponges Consists Mainly of Dissolved Organic Carbon (DOC)

Coral-excavating sponges are the most important bioeroders on Caribbean reefs and increase in abundance throughout the region. This increase is commonly attributed to a concomitant increase in food availability due to eutrophication and pollution. We ...

www.ncbi.nlm.nih.gov

The Role of Marine Sponges in Carbon and Nitrogen Cycles of COral Reefs and Nearshore Environments.

The role of marine sponges in carbon and nitrogen cycles of coral reef and nearshore environments - ProQuest

Explore millions of resources from scholarly journals, books, newspapers, videos and more, on the ProQuest Platform.

search.proquest.com

And since we're discussing favorable and not so favorable bacteria here's a paper looking at how different corals and polyps are influencing the bacteria in the water column.
Aura-biomes are present in the water layer above coral reef benthic macro-organisms

Aura-biomes are present in the water layer above coral reef benthic macro-organisms - PubMed

As coral reef habitats decline worldwide, some reefs are transitioning from coral- to algal-dominated benthos with the exact cause for this shift remaining elusive. Increases in the abundance of microbes in the water column has been correlated with an increase in coral disease and reduction in...

www.ncbi.nlm.nih.gov

 

[fishgutz]

take a look at the "tank of the month" from whatever forum you choose. You will rarely if ever find a tank at that level that does not perform regular water changes.
It can be done, but rarely with the result most of us are striving for.

 

[DHill6]

In the early stages of a tank I think water changes are important. After it matures I don't believe it is as important as long as you keep your water chemistry going without the water changes. Here is a video of my 12 year old tank. I haven't done water changes really for 9 years now.

Very nice, coral placement isn’t crowded. Fish are nice and healthy.