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I saw this on my tank glass a few weeks ago and thought it is a baby brittle starfish, although I've never had one in my tank and haven't added anything new in months. Then today I saw three at the same time. They are white and no more than 1/4 to 1/2 inch from tip to tip. Their movement sure...

I have had incredibly high nitrates for a long time and nothing will drop them (water changes, filter changes, nitrate remover, Chemi-Pure, Purigen). Clerk at the local fish store said it could be due to my undergravel filter, and I shouldn't even have one. I have an underground filter along...

I have one anemone (bubble tip) in the tank that has stayed in one place since I got it three months ago. I bought another last week (long tentacle) and placed it at the other end of the tank, my tomato clown eventually found it and now travels back and forth between the two anemones. The new...

I've read online that some people don't feed them and some do. Those that do use everything from cyclop-eeze to their own mash of brine shrimp, etc. I was wondering what you all think on this subject. I am fairly new to keeping them (3 mos) and applying Kent Microvert to the entire tank but...

I have had a bubble tip now for about three months. When I bought it, the tentacles were stubbier and fatter and it immediately found a crevice and hasn't moved since. However, now most of the time it spreads out more like a long-tip where you can see the mouth and the tentacles are longer and...

Can anyone tell me what kind of coral this is? Also, coming out of the same group of "branches" some of the polyps are phosphorescent with green centers and some are not and have dark orange centers. Anyone know why?

I left my 20g tank go dormant with no live fish for about 6 months, kept the filters running (u/g and penguin 300 bio-wheel) but no lighting. I revived it 2 months ago with a 50% water change, new additional lighting and a new Eheim 2213 canister filter to replace the penguin. The filtration...