I dosed phosphate-e at the normal concentration last night after cleaning out the sump. I tested for phosphorus around 4:00 today and got 5 ppb. That equals 0.015 phosphates. As much cyano as I pulled out of the system I can see at least one reason why the sudden swings in phosphates were happening.
Yesterday’s test showed 0.05 ppm phosphates. I dosed enough to bring phosphates down by 0.08 ppm however. The DT looked like pea soup after the sump cleaning. While the corals and pods likely ate some of the algae and cyano in the water column most of it died off. I also fed pellets last night.
My RO/DI should be arriving later next week or just after the new year (thank you
@Lost in the Sauce more than you know). Armed with RO/DI and the phosphate trends in the system, I’ll be able to dial in the dosing to keep phosphates where they’re at; and keep them stable.
The difference between when my phosphate levels were 1 ppm and today’s 0.015 ppm is like night and day. My duncans especially respond to low phosphates with better coloring, faster growth, and good tentacle extension. Even the soft corals have better coloring and growth rates.
I’m also going to start running GAC in one of my emperor 400s. I really want the yellow in the water gone. Soooo
@tbrown3589,
@Lost in the Sauce,
@fishguy242, and
@Mschmidt do you run GAC? If so does it suck out the trace elements? Does your chaeto still grow well (if you have it that is)?