Still trying to get this thing working like it should.\r\n\r\nCalcium? Stilll waiting on a new test kit but I think its between 345-375\r\nAlkalinity-2.5\r\npH 8.2\r\nSalinity 1.025\r\nTemp. 78\r\nPhosphate .02\r\nAmmonia 0\r\nNitrite 0\r\nNitrate 20-30\r\n\r\nIm not sure what I have under my tank ( wet dry? trickle filter?) whatever it has an overflow that drains over bio balls and then back into the tank. Since everything I read say this is probably contributing to my nitrate problem Im wondering what are my options on changing this out? \r\n\r\nthe water drains under the devider rather than over so replacing them with a sand bed is not an option. \r\n\r\nAlso the doors in the front of the tank are only 9" wide so the tank would have to be emptied to make any real modifications. \r\n\r\nAny suggestions?