I have amped the 4th day dosage on my main frag tank. My main frag tank is rated 130g wih approx quarter of it with live rock, sump 35g with 3 inch sand bed and half filled with water, RDSB 35g with 6 inches of sand. I did approximate my net water volume to about 150g. I initially dose 13mL with good result, so I put 15mL today expecting an excellent result within 2 days. If not, then I have to increase further the dosage with additional 2 mL ( I might miscalculating my total/net water volume). I'm just itching to eradicate all algea on my tank. My crab, snails, yellow Tang and hated Damsel says "hi" to everybody.:bablefish. I have prepared my Microscope to do an autopsy if just in case any of my fish dies. I will pay attention to those gills!