hi all! i need to move stuff around in my DT. its long overdue. but im a little worried because of aiptasia. will that just make them spread worse moving stuff around? esp since they are in the sand too?
is it ok to move my rocks around?
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Please provide a picture of the tanks so we can see what you are planning to move.
Corals that have been growing in place (under the same light source for a long time getting the same current flow etc) will have adapted to those conditions in that spot. Moving things can be a death sentence for hard corals, especially if they are already stressed.
As far as aiptasia go, move them, kill them, give them Kleine butterflies, and copperbands, and Berghia nudis and peppermint shrimps and they may easily find a hiding spot where they grow without you even being aware of them.
Really.
Corals that have been growing in place (under the same light source for a long time getting the same current flow etc) will have adapted to those conditions in that spot. Moving things can be a death sentence for hard corals, especially if they are already stressed.
As far as aiptasia go, move them, kill them, give them Kleine butterflies, and copperbands, and Berghia nudis and peppermint shrimps and they may easily find a hiding spot where they grow without you even being aware of them.
OP
OP
i dont really have hard corals. there is just quite a bit of empty space in the back and want to move stuff around a little bit. heres a pick of the tank
SantaMonica
Valuable Member
This may apply too...
What is Periphyton?
Periphyton is what turns your rocks different colors. You know... the white rocks you started with in saltwater, or the grey rocks (or brown wood) you started with in freshwater. After several months or years, the rocks become a variety of different colors and textures. Why? Because the periphyton that has grown on it is a mix of different living things, with different colors, and thicknesses. And the important part is: It is LIVING. And the thicker it is, the more living material there is.
That's right: The colored stuff that has coated your rocks is all living organisms. Sponges, microbes, algae, cyano, biofilms, and of course coralline in saltwater. After all, "peri" means "around the outside", and "phyto" means "plant". Have you ever slipped while walking on rocks in a stream? That's the periphyton that made it slippery. It can be a very thin coating on the rocks, sometimes paper thin, but it covers the entire surface, especially across the top which gets more light.
There is a lot of photosynthetic organisms in periphyton, and this means that they need light; but they need nutrients too (ammonia, nitrate, phosphate). And as you might guess, the organisms will prefer the illuminated portions of the rocks, and will grow to intercept food particles in the water, based on the water flow. Just think about how sponges orient their openings for water flow; the micro sponges in periphyton do it too, but on a tiny scale.
What about in caves and holes? Well periphyton here don't get much light, so they are primarily filter feeders (non-photo). So they REALLY grow and position themselves to be able to intercept food particles in the flowing water.You'll sometimes see little tree-like arms or branches sticking out to get the particles; these are usually "forams", otherwise known as foraminifera. They require a lot of food particles in the water. Think of them as coral polyps without the coral.
Reef studies have shown that at certain depths, more of the filtering of the water comes from periphyton and benthic algae, than comes from the phytoplankton which filters the deeper water. And in streams, almost all the filtering is done by periphyton because the water is so shallow. So, what you have on rocks that are "mature" or "established" is a well-developed layer of periphyton (and all the good natural things that comes from it, like nutrient absorption and food generation). They have nice colors too.
This is why mandarin fish can eat directly off the rocks of an "established" tank (tons of pods grow in and consume the periphyton), but not on the rocks of a new tank. Or why some animals can lay their eggs on established rocks, but not new ones. Or why established tanks seem to "yo-yo" less than new ones (the periphyton is a giant, self-adjusting filter). Even tangs can eat periphyton directly when it's thick enough. Yes periphyton can also develop on the sand, but since the sand is moved around so much, the periphyton does not get visibly thick like it does on rocks. So thick periphyton on established rocks is your friend. And totally natural too. That's why there are no pure white rocks in natural reefs. Keep in mind though I'm not referring to nuisance algae on rocks; I'm only referring to the layer of coloring and textures that coats the rocks, and the little arm-like structures that stick out from under rocks.
But what happens when you "scrub all the stuff off your rocks"? Well, you remove some of the periphyton, which means you remove some of your natural filter and food producer. What if you take the rocks out of the water and scrub them? Well now you not only remove more of your natural filter and food producer, but the air is going to kill even more of the microscopic sponges. And what if you bleach the rocks? Well, goodbye all filtering and food producing for another year. It's an instant reduction of the natural filtering that the periphyton was providing. So it's best to not do these things at all.
However, what if you just re-arrange the rocks? Well, some of the periphyton that was in the light, now will be in the dark; so this part will die. And some of the periphyton that was in the dark will now be in the light, so it will not be able to out-compete some photosynthetic growth and thus will be grown over and will partially die too. And even if the light is the same in the new location, the direction and amount of water flow (and food particles) will change; forams and micro sponges that were oriented to get food particles from one direction will now starve. So, since the light and food supply is cut off in the new location, the filtering that the periphyton was providing stops almost immediately, due only to your re-arranging of the rocks.
Starvation takes a little longer. The periphyton organisms won't die immediately, since they have some energy saved up; but instead they will wither away over several weeks. So on top of the instant reduction in filtering that you get by just moving the rocks, you get a somewhat stretched-out period of nutrients going back into the water. And after all this, it takes another long period of time for the periphyton to build up to the levels it was at before: 1 to 2 years. Even changing the direction of a powerhead will affect the food particle supply in the area it used to be pointed at. This is why "mature tanks" take 1 or 2 years to develop.
So a good idea is to try to keep everything the same. Pick your lighting, flow, layout, and then try to never again change anything. In other words, treat your rocks just like the rocks on a reef. It's a different way of thinking, but you should have a stronger natural filter and food producer because of it.
What is Periphyton?
Periphyton is what turns your rocks different colors. You know... the white rocks you started with in saltwater, or the grey rocks (or brown wood) you started with in freshwater. After several months or years, the rocks become a variety of different colors and textures. Why? Because the periphyton that has grown on it is a mix of different living things, with different colors, and thicknesses. And the important part is: It is LIVING. And the thicker it is, the more living material there is.
That's right: The colored stuff that has coated your rocks is all living organisms. Sponges, microbes, algae, cyano, biofilms, and of course coralline in saltwater. After all, "peri" means "around the outside", and "phyto" means "plant". Have you ever slipped while walking on rocks in a stream? That's the periphyton that made it slippery. It can be a very thin coating on the rocks, sometimes paper thin, but it covers the entire surface, especially across the top which gets more light.
There is a lot of photosynthetic organisms in periphyton, and this means that they need light; but they need nutrients too (ammonia, nitrate, phosphate). And as you might guess, the organisms will prefer the illuminated portions of the rocks, and will grow to intercept food particles in the water, based on the water flow. Just think about how sponges orient their openings for water flow; the micro sponges in periphyton do it too, but on a tiny scale.
What about in caves and holes? Well periphyton here don't get much light, so they are primarily filter feeders (non-photo). So they REALLY grow and position themselves to be able to intercept food particles in the flowing water.You'll sometimes see little tree-like arms or branches sticking out to get the particles; these are usually "forams", otherwise known as foraminifera. They require a lot of food particles in the water. Think of them as coral polyps without the coral.
Reef studies have shown that at certain depths, more of the filtering of the water comes from periphyton and benthic algae, than comes from the phytoplankton which filters the deeper water. And in streams, almost all the filtering is done by periphyton because the water is so shallow. So, what you have on rocks that are "mature" or "established" is a well-developed layer of periphyton (and all the good natural things that comes from it, like nutrient absorption and food generation). They have nice colors too.
This is why mandarin fish can eat directly off the rocks of an "established" tank (tons of pods grow in and consume the periphyton), but not on the rocks of a new tank. Or why some animals can lay their eggs on established rocks, but not new ones. Or why established tanks seem to "yo-yo" less than new ones (the periphyton is a giant, self-adjusting filter). Even tangs can eat periphyton directly when it's thick enough. Yes periphyton can also develop on the sand, but since the sand is moved around so much, the periphyton does not get visibly thick like it does on rocks. So thick periphyton on established rocks is your friend. And totally natural too. That's why there are no pure white rocks in natural reefs. Keep in mind though I'm not referring to nuisance algae on rocks; I'm only referring to the layer of coloring and textures that coats the rocks, and the little arm-like structures that stick out from under rocks.
But what happens when you "scrub all the stuff off your rocks"? Well, you remove some of the periphyton, which means you remove some of your natural filter and food producer. What if you take the rocks out of the water and scrub them? Well now you not only remove more of your natural filter and food producer, but the air is going to kill even more of the microscopic sponges. And what if you bleach the rocks? Well, goodbye all filtering and food producing for another year. It's an instant reduction of the natural filtering that the periphyton was providing. So it's best to not do these things at all.
However, what if you just re-arrange the rocks? Well, some of the periphyton that was in the light, now will be in the dark; so this part will die. And some of the periphyton that was in the dark will now be in the light, so it will not be able to out-compete some photosynthetic growth and thus will be grown over and will partially die too. And even if the light is the same in the new location, the direction and amount of water flow (and food particles) will change; forams and micro sponges that were oriented to get food particles from one direction will now starve. So, since the light and food supply is cut off in the new location, the filtering that the periphyton was providing stops almost immediately, due only to your re-arranging of the rocks.
Starvation takes a little longer. The periphyton organisms won't die immediately, since they have some energy saved up; but instead they will wither away over several weeks. So on top of the instant reduction in filtering that you get by just moving the rocks, you get a somewhat stretched-out period of nutrients going back into the water. And after all this, it takes another long period of time for the periphyton to build up to the levels it was at before: 1 to 2 years. Even changing the direction of a powerhead will affect the food particle supply in the area it used to be pointed at. This is why "mature tanks" take 1 or 2 years to develop.
So a good idea is to try to keep everything the same. Pick your lighting, flow, layout, and then try to never again change anything. In other words, treat your rocks just like the rocks on a reef. It's a different way of thinking, but you should have a stronger natural filter and food producer because of it.
OP
OP
very interesting. thank you for that. well thought out!
Extremeengineer
Active Member
So if I want to move say half of the rocks, keeping a largely similar layout, just moved back a couple of inches, and maybe one rock rotated slightly, in a 6 week old tank, it sounds like I am not far enough along in the process to cause a big stir. I have realized that in trying to give a good swimming area for the fish I have basically built my aquascaping in the middle front to back, and if I just shift a few inches back I think the tank will still have plenty of swimming room behind, but allow me a lot more latitude for corals in front going forwards. With only fish in at this point, I am not changing any lighting for corals, and how I'm planning to move I think all cave homes will be retained.
littlefoxx
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To be honest Ive moved rocks around a lot in my tanks if I see a need to for the tangs and never had an issue. I also have a FOWLR so theres that consideration with corals. To be honest your tank is beautiful and corals look so happy at the moment that I wouldnt mess with anything but thats just me! Maybe if its an empty space you just want to fill get some dry rock structures or something and add rock? Just my two cents!
Ps your hippo tang is stunning!
Ps your hippo tang is stunning!
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