I agree that if you siphon stuff out, the water changes are a lot more effective for nutrient reduction.
Do the Pharmer's make a nice pocket blood Phosphorus test kit? If so, could we somehow use these to indicate differences in the dissolved organic Phosphorus content of seawater?
randy i know im not supposed to look at orp anymore esp sice i took off the ozone, which btw the tangs thankyou very much lol i mean they are growing back!! and anyone who saw this would definitely not use ozone and carbon anymore>>> which then gets into a whole another debate on which was the culprit or was it the combo..... anyway.... heres the question why is my orp down 20 ticks from 310 to 285 from removal of gfo or vodka vinegar dosing ?? i have less nitrate and phosphate measures almost zero anyway and tank looks clearer