My tank is fairly new with few frags and still no growth of coraline algae. I Dose about 3ml of red sea foundation b alk daily and that still lowers about little less than 1.0 dkh per week. So i guess i will need to raise my alk to keep it no lower than 8.0 dkh. How much dkh does ur tank consumes daily? and how much 3ml of alk do you dose daily?