twomonsters

Six drops of Phosphate Control will lower your phosphate by .5ppm for every 10 gallons (37.9L) of water.

It should bring them down .5ppm, not 1ppm. If your tank is measuring .04 now, you don't need to dose that much. However, if you did use 6 drops per 10g of water (72 drops), it will bring them down to 0 without any risk since you aren't bringing it down nearly as much as .5ppm would. That being said, why not use 3 drops per 10g (36 drops) and see how the tank measures the next day? It should still read 0, mathematically.

Thanks for the clarification. I am going to dose 32 drops.

Do it after lights out when the fish are asleep.

Ok, do you think I should drip it into a Felt 200 micron sock?

I just drip it into the skimmer section. If you want to do it into the sock or the body of your skimmer, that's fine too.

After reading Melev's blog I decided to drip it over the course of 3 hrs, 36 drops in the skimmer section of my sump. Before I dosed my Phos was at .07. I'll test again in the morning to see how it worked. Then tank is just a shade cloudy, but then again its hard to decipher since the diamond goby is on a sifting spree.

Be sure to give us an update tomorrow!

Just about 24 hours later and the Phos is at 0. The slow dosing approach worked well for me, with minimal clouding.

There you go!