the product use is mardel 5 in 1 strip thats what it read for like 3 weeks straight at this level do i need to buffer up and make the water harder? filter i have two rena x3 over filter the tank I've kept bichirs for over a year this is the first time it happen to me the last order I from toyin was cong nigerian endli koliba and volta. the nigerian endli are in a 55 until they are big enough to be in the 120 wide with the volta cong and two endli i and an ansorgeii i got from a pevious order