Originally Posted by irondog
I feed 1 frozen cube of mysis everyday,can that cause nitrate
Well that may be causing you phosphates, thus algae problems, the fish then eat the mysis and poop, causing the breakdown into nitrates. You see manufacturing frozen foods like that they use P04 as a preservitive, if your feeding every day then it could be causing some problems. you may want to opt to feed frozen every other day, and flake in between.
If you are running carbon 24/7 it might also be causing PO4 problems, many carbons can leak PO4.
Are you having any algae problems?
I too have seen many tanks setup with crushed coral, I even had a 55 gallon with crushed coral. Found it was trapping tons of food and detritus. Every time I did a water change I vacuumed dirty water out of the CC. Even when I changed my feeding habits and was better at maintanence I still had problems, not until I got rid of the crushed coral did things begin to turn around for me. It is also my opinion that udergravel filters are a horrible thing for a salt water tank.
Thomas