All 3 brands of liquid carbon (Excel, Easycarbo and AE) advise a higher dose when initially setting up a tank or after a large water change. This is followed by a recommended daisly dosing of about 1/6th that amount. It has ben mentioned that liquid carbon only lasts in the water column for about 24 hrs. If this is true then why isnt the daily dose higher and what is the point of the initial high dose ?