biological filtration

For fun I've been messing around with adding an overflow box to a water box 25 gallon peninsula in order to have a sump in the stand. In doing so I found been using a nano refugium I can fit and automatic fleece roller a full size protein skimmer, an algae reactor, as well as media reactors...

hi all! So my fluval evo gave up on me and one of the seals went. I managed to salvage my livestock and it’s now sitting in a separate container. I have a 4 big bags of media which has been established for 2 years. Livestock consists of 1 clown fish, 1 royal gramma, 1 peacock wrasse and 1...

I’m changing my aquascape out with new rock work. I have 2 structures I’m adding. I removed half the live rock already and put one of the new dry rock structures in. I’m debating on a waiting a week before removing the rest of my old rock with the rock to give time for the biological filter to...

I have a canister filter and recently bought a second one to replace my orginal one. Both have been running together for two weeks, so I’m going to take the old one out. Should I just keep the biological media and put it in the new one or use as much of the old sponges as possible. Preferably...

Say you lived in an alternate universe where reefers had so much extra space in a sump... What would be the argument toward or against filling it to the brim with bio media as opposed to having just enough to serve your bio load? Can too much bimedia cause a problem or challenge? Is more better?

Hello, I am looking to get a juvenile coral cat shark for my 75 gallon saltwater aquarium then move him to my 240 gallon. I have very little experience with sharks especially in smaller tanks. The 75 gallon where he will only be for a short amount of time has 15 lbs of live rock so he has room...

spaghetti worms have colonized my air filter. Explains why my nitrates always seem low. Not complaining though.