Well I found out today from the guy I bought my 180 tank from (was a fish only tank) that the sand in the tank is at least 5 years old. So is the sand still good? Maybe cause of my super high nitrate problem? Nitrates still threw the roof. Ive pulled the fish and stopped the water changes guess Im waiting on it to finish the cycle (if that is whats its doing). I have chalupra and chaeto in my sump blah blah blah im sure everyone has read the other posts.