susz
09/23/2011, 09:34 AM
I have a 5 gallon nano with a clown fish, some filter feeders, mushrooms, and sponge. I have some great purple coraline algae. It has been running for about 4 years and I need to replace the bio mechanism and also the sand. I was thinking that it would be best to do this is 2 stages. Either change the bio filteratin sysem and then wait a month and then change the old crushed shells for fresh live sand. I am worried that my tank will get a "toxic tank syndrome' if I don't replace the crushed shells as they are worn to dust. If any has any comments on this procedure , I would apprecaite knowing how they would do it. I have a ph of 8.1, ammonia 0, nitates 0, nitrites 0, calcuim 390 ppm and dKh of 5.6. After doning these changes I was going to work on getting my dKh higher and also my calcuim levels. thanks susz