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Could adding top off water affect the salinity enough to shock sea urchins? I assume no, since i have a few asterina stars that are fine with it but those are also very hardy so I wanted to make sure. Thinking about getting a tuxedo sea urchin since I like them so much.

So I have a 90 gallon saltwater tank. I’m using a external overflow. It’s getting old and there is two cracks forming on each side of it and I’m afraid one day it’s just going to give out. My 90 gallon tank has a hole drilled on it. It has a bulkhead installed it’s about 6 inches from the top on...

Just an interesting thought I had, what qualities would you view as being most important in Reefing? I know its a tough choice, but you can only select your top 3 options in the poll! Will be interesting to see with some data what we view as being most important! Equipment (Quality...

Hi all! I got a maze brain coral recently and I've noticed that it's feeder tentacles are bubbly looking, is this normal or a cause for concern? And if it is what could cause this and is there anything I can do about it?

Just for fun... What is it that you HATE about this hobby? Post answer with a pic/gif! Ill get it started ;Dead:

I want to rearrange my live rock for a couple of reasons. the most important being all of my coral, I want to change it to create better placement for my coral now and future coral. The second being it does not look complete in terms of rock work. This leads me to my question. Is it okay to...

Hello! I am starting a a simple 20 gallon long reef tank (dimension are 30x12x12) and I would like to have an ATO. I have looked at quite a few ATO systems, but with no sump I'm wondering if I could add one? If I add the sensor to the tank will surface agitation mess with the sensor causing it...

Hello! I’m new to the world of fish and I recently got 2 betta fish. My grandma recently bought me a new 10 gallon tank so I decided I’d also put some fish in there. Problem is, I don’t have any pet store near me so my only option is online shopping. I’m thinking of getting fish from...

I’m looking into sea cucumbers, the pink spiney and black and pink cucumbers. The issue is some websites say their care level is easy and others say expert only, so which is true? Anyone have either variety and have any insight?

I currently have a 45 gallon saltwater tank I took over and is a rescue tank.. all my levels are steady and have live sand and dry rocks that have been in the tank over 3-4 months now.. The rescue tank came with 2 clown fish and I have recently added a royal gramma basslet.. what fish should I...

Every night when my lights are off, my corals look god awful at night. Melted, small, closed, just terrible, but then during the day everything looks fabulous. Is there any science or reasoning behind this? Does this happen to anyone else?

Can 2 or 3 Display tanks plumbed to the same sump technically making them an all in one system. I guess a big concern for anyone doing this is flooding in a power outage but I suppose then you do your research on what kind of sump you need or are going to make. so when the water drains it...

This is probably a silly question but I’m going to ask anyway. I have a tank that I’ve had up for a few weeks of fresh water fish and a snail. I kept going back and forth if I wanted to do salt or fresh started with fresh now I’m gonna go to salt since that’s what I really want. My question is...

Relatively newer reefer enthusiast here :) I was searching for a replacement Neptune Conductivity Probe recently and I actually found one! Apparently, it's mfg date is 2016, however, it's new with still capped solution attached (according to the supplier, Dynamictank.com). The probe is...

Bought this torch couple days ago and noticed that it’s arms had branching arms or multiple heads along with other deformities. It’s healthy and looks the same as when I bought it, was just wondering if it was normal.

Does anyone know what this is? I found this worm just sitting out on the open on a frag tile in the frag tank. Their is now sand and zero live rock. It could have been introduced on a frag plug but I dip everything before it enters this tank. I’m just confused on how I’m just now seeing this...

Hello everyone! just thought I’d start with water parameters…. They are all good. I have noticed these little lumps on my hammer coral and over the last week they have grown bigger and began to grow what look like small tentacles. Are these new heads growing?!

So I’ve had my Duncan for quite some time now and can say that it is by far my favourite coral I own. It’s grown 4 new heads since the time I originally purchased the single polyp frag and looks absolutely fantastic! With this I can’t help but wonder why the base/skeleton hasn’t grown at all...

I just put them in the same tank after putting them in small tank adjacent to each other they did not seem to be aggressive so I put them isn’t the same tank. I’ve had the blue one for a couple months now and 4 day ago I bought him a mate. I read the wiki how page about breeding beta fish and...

Hey folks! I recently upgraded my lighting on my standard 29 gallon from a Orbit Marine LED to and AI Prime. The light is sitting about 10" above the tank, and I'm getting a good spread of light all around the tank, except on the right hand side because of my two massive 15 lb rocks sitting...

Hey guys, so a little backstory: I’m a newer reefer but I’ve been a freshwater keeper a few years, and I work at my LFS. I have a 13.5 gallon fluval evo that’s been setup since mid January this year (so about 3 1/2 months). Rn I do weekly water changes and I don’t have a skimmer or fuge but I...

My friend just gave this to me. How come my holy grail is so skinny? Unlike my other torches it is the skinniest? Lol please help? I dipped it and all my parameter is ammonia: 0 Nitrite: 0 Nitrate: 0-5 PPm

I picked up a Waterbox Peninsula Mini 25 and saw they had some of their 2418 stands on clearance and went ahead and picked one up as well. The stand was made for their aquariums meant to be ran with a sump so they have a U shape cut out in the back for the overflow and return piping. So my...

Just noticed this growth on my hammer coral a couple of days ago it also retracts slightly when I shine light on it. Anyone experience something similar?

Hello! Yesterday I went to my lfs with the intentions of grabbing an anenome and 3 peppermint (hoping they’re true) to deal with my very mild aptasia issue I’ve had for the past year in my 120. Knowing myself, I walked out with 6 peppermint, a urchin, and a horseshoe crab. i purchased the...