filtration

OK, 29-gallon aquarium. Filtration: I have a large sponge filter sans airstone and a HOB filter. Co2 Dosing: pressurized system. I go for about 2 bubbles per second. Issue: I cannot get the Co2 checker to turn green. The solution works fine. I was able to breath in to it and it changed...

I'm planning on getting back into the aquarium hobby after several years and properly doing a planted aquarium (ie, actually researching it). I already have the aquarium (Lifeguard R460008 Medium – 23.62″ x 11.81″ x 11.81″) and stand but everything else still needs to be purchased. I'm also...

Hello forum members. I don't know if this is the right subforum but It seemed the best fit. I converted my 200-gallon reef to freshwater planted. My question is for those with a large tank and sump. Which biological media are you using? Thanks ahead for your input/suggestions.

Hello all! I need to get some new bio filtration for my fluval 306. The fluval medium that I used last time seemed to really hold on to nitrates. What do you all run in your canister filters? I was going to use lava rock because I have it on hand. Rethinking that one.