Sand Question

[Myka]

I agree with Brad (Aquattro). I'd remove it 1/3 at a time too. Remove the full depth - don't leave the bottom portion. The bottom portion will likely be anaerobic and exposig it would cause it to suddenly go aerobic killing off the bacteria and causing a cycle (ammonia spike).

Personally, I keep a 1/2 - 1" sand bed and I gravel vacuum it on every water change. I do this with client tanks too.