bathsheba9
Reefing newb
I am a newbie with saltwater and sorry if you have had to explain this before but I have been reading some of the posts on high nitrates and have read where canister filters can cause high nitrates along with bio balls! Have been told that they are second only to sump filters. I have 3 canisters, one with bio wheels on the 75g and nitrates are not at a zero reading and have not ever been (bless my poor fish). So I am asking for info on why canisters and bio balls can produce high nitrates. Thanks so much. Amy