I've always been too cheap to buy a good PO4 test kit or meter. Recently I've gone from a 2 month interval to 1 month to see if I notice any difference. Since I have macro-algae in my sump, and very little algae in my display I assumed PO4 should be low in my tank... but I don't know.
One of the reasons I'm curious about this is despite having unmeasurable nitrates, and 400w bulbs the Purple Digitata in my tank is always brown. I wondered if phosphate may be the cause of this.
Last edited by Reefer Rob; 11-30-2009 at 09:56 PM.
|