Did my first water change yesterday, used a gravel vacuum and it worked out well with no mess at all. Before the changeH 7.6, ammonia a little above .25, nitrates 10, and nitrites 10. After the water change ph still at 7.6, ammonia .10, and both nitrates and nitrite 0. Last night added ph decreaser and ammonia lock. Right now in the tank Ive got 6 glo fish, 3 red/blue tetras, and a plecto. Is there anything else I need to do, Im putting a new filter in today. Anyone heard anything good or bad about Aquaclears insert that has both carbon and ammonia in it?