I dont have access to a RO
unit and dont want to spend so much for one. Keep in mind that I have another 4foot tank that dones't have pH problems. THe only difference between the two tanks is that one uses crushed coral as substrate and the 2foot tank that has pH problems is using a marine aragonite substrate. Some guy at the LFS
reckons that marine aragonite dones't really help buffer the water at all and recommended that I switch over to crushed coral..
Anyone has any input if crushed coral is better than marine aragonite??