hi everyone..i started a freshwater tank in january and since then it has been nothing but trouble, i can keep it looking normal for the life of me..im sure its something very simple but this is my first tank and im totally lost...(the people at pets mart have been no help..surprising?)...my tank water is very foggy and has been for about a month and a half now..i have vaccuumed the gravel, done water changes, changed the filter cartridges..and so far nothing has worked...there is no algae in the water its just pure cloudiness...you can't even see through the water, you can only see the fish if they come right up to the glass...i have mardel 5 in 1 test strips and have been checking the water regularly and it says my nitrate is at 80...i thought vaccuuming would bring it down but so far nothing has changed..and im very worried about my fish..none have died..but i need some help fast before they do...i have 4 tiger barbs, a catfish and an eel..(not to mention the forever multiplying snails that have been taking over my tank)...if anyone could help me out i would really appreciate it ..i would love to enjoy my tank (if only i could see the fish:freak: )...(i have a tetra whisper power filter, and i put stress zyme into the tank about every 2 weeks...) if there is anything else you need to know to help better answer my questions just let me know!....p.s. the water in the tank seems to evaporate rediculously fast...within a few days my tank water goes down about an inch and i have to top it off with new water..is this normal? i constantly have to push my heater down further so it doesnt break because the water goes down so fast...should this be happening to often and so quickly? PLEASE HELP..i need some veteran advice here!