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I just read that you should not have a tight-fitting lid that completely covers your tank because you won't get enough oxygen/gas exchange to the tank. Is this true? I thought I should cover it completely so fish can't jump out. I have a glass cover and then I cut the plastic strips to fit...

I just received a refractometer I ordered online. It says to calibrate with distilled water, so I did that. Then I tested it with some 1.026 calibration fluid that I have (bought with another refractometer from a different vendor that had spots in the prism and I sent back). I thought it...

I added some live rock from the LFS a few weeks ago, and one rock had a lot of green algae when I got it - I think it's known as "hair algae" according to what I've been reading. I thought it looked nice in my tank, as it's a very bright green and I thought only brown algae was bad. Now I've...

Hey everyone, just wanted to get a quick opinion about my (updated) stocking plan. I already have the 3 chromis (getting along well now) and royal gramma (love this fish). 3 blue-green chromis 1 royal gramma 1 starry blenny 2 black/white clowns 1 coral beauty If I have the blenny, should I...

I got 3 blue-green chromis 12 days ago. They are in my 20-gal QT. The smallest one is getting picked on by the other two (mostly the biggest one). His coloring looks off - some of the scales are a darker color. But then later on he looks normal like the other ones. Is this coloration...

Hi everyone, newbie here :) Seeking advice on how to stock my 55-gal tank. Right now I have 3 damsels that the LFS sold me to get started (I had live sand and the bottled bacteria so my ammonia never got too high for them, they didn't suffer). Two are dominos and one is a yellowtail. I heard...