Originally Posted by minniling
My tank is well established 55gal. I have
1 fuzzy lion fish
1 orange spined unicorn
1 royal gramma
1 watcher goby
4 green cronis
hermits and snails
I think that is a large amount of fish for a 55 gallon tank. My questions would be this:
What are you feeding the Lionfish? Live and even frozen foods can easily raise nutrient levels thus causing your nitrates to spike.
Also what kind of filtration are you employing? While many casual hobbyists like canister filters many people call them "nitrate factories" as they can house lots of waste and cause for a great amount of bacteria to multiply thus creating excessive nitrates.
Do you have a refugium? These areas where Macro-Algae can grow freely can quickly lower nitrates and lessen the growth of undesirable algae.
Do you use a protien skimmer, if so does it have biological media? Many skimmers on the market employ a bio-media like CPR's bio-bale to add in biological filtration. While this is good is can cause for excessive nitrates.
's are a good start to lowering nitrates but often are only a band-aid to a much larger problem. There is a nutrient problem in your tank contributing to your nitrate reading, it is a matter of finding out what it is or putting systems in place to assimilate the nitrates.