my brother just bought a 90 gallon tank with, fish, coral,and some live rock for $100, plus she gave him a dual filter r/o unit. also all the pumps, sump, lights, stand and cabinet, im talking every thing. he lives in north east Ohio, like in Amish country. he has well water and decided that filter really wouldn't work with straight well water. so he opted for wal-mart water and sent me the r/o unit. all i had to do is pay shipping, like $18. so my question is where can i buy new filters for the r/o unit? i have made water with it and it was fine. but i would like to have the newer filters. it dosent make clean water fast its like 1 gallon every 30 minutes or so. i have been using tap water sometimes, now i wont have to. i think its worth the price?