Ok, I know I've started a couple of threads within the last few days... but there is good reason. Bought a kit to test my water params last night (used to take in a sample to the LFS) and here are the results: Ammonia: 0 Nitrite: 0 PH: 8.3 Temp: 81 Salinity: 1.022-1.023 and nitrates: 80 ppm!!! How bad is this? For reference, I have a 20 gallon tank with about 5-6 pieces of LR (estimate 20lbs?), hang on the back filter, T5 lighting (1 10k, 1 actinic) I plan on doing a water change today as soon as I get off of work to hopefully bring these nitrates down. I'm thinking the cause is because I've recently purchased 2 new fish (false perc and bangai cardinal) and they haven't been eating very well. Thoughts? Thanks. Here is a photo of something that I thought may be contributing to all of this... its a photo of a lot of "garbage" on my sand... little black specs, etc.