I have a 30 gallon tank. I have cycled it and after 2 months I added one catfish. I recently added a "mystery snail" I had live plants but the snail ate them so now it is all artifical plants and one catfish. After I do a water change within one week my water is so cloudy I can not see in it. I check the levels and everything is checking ok but it can't be right if it is that cloudy right? Also when i do a water change the I can see "particals" floating in the water. Everything in there seems to be happy and living just fine but I have never had such a problem with cloudy, unclear water. What happened? Please help!!!!!