Originally Posted by sansouci01
This is my first salt water tank so I'm cautious about everything. I have a fresh water 55 gallon tank with a pretty heavy bio load and do weekly water changes of 50 % and I'm happy if my nitrates are in the 20 to 30 ppm
range and my fish are fine..
Most marine fish are more sensitive to nitrates than FW
fish, but 5 to 10ppm is acceptable.
you have corals, however, this is still way too high. I'm guessing that if nitrates are up, so are phosphates..... they usually go hand-in-hand. For reef tanks, the aim is to keep your nitrates & phosphates as close to zero as possible. To avoid too large of a change at once, do smaller pwc
's more frequently.