Hi - I have a 29 gallon tank with about 20 pollaties- mollies - guppies - tetras -tiger barbs and one large pocastamus (sorry not sure how to spell it). We have had problems with white cloudy water. I got the eco block a month ago and two days ago we even replaced my old aquaclear filter to a marineland power filter penguin 150. Today I tested my water (with the tubes) and my PH - Amonia and Nitrate/Nitrites were all high. I tested last week and only my PH was high. My husband and I are going back and forth on the feeding. I think we need to go to once a day. Also, when we feed them the pump pushes the food to the bottom. Should I turn off the pump when feeding? Please help.