Having some trouble bringing down my phosphate, ive been running a small bag of rowaphos for about 5months with no hit on the phosphates... what could i do to have more impact on taking it down, of course slowly?
The method/quantity of Phosphate remover will vary depending on not only your Tank Size, but on your fish load and how much you feed them. (plus other factors like Algae in your DT, rocks/substrate leaching built up Phosphate, etc)
I have a 110Gal Tank, and I've been struggling to keep Phosphate down for months.....
thinking I could somehow avoid GFO.
I do have an Active Algae Scrubber that produced good harvests every other week, and that kept my Tank Algae Free.
However even with Algae Scrubber (growing two kinds of macro algae on screens and tumble) my tank would naturally run phosphate at 0.4ppm.
For a few months I tried using AquaForest -NPpro with Bios, which did nothing for me.
I considered getting into Red Sea NO3PO4-X (for both N&P reduction) which from what I read does work if used properly (with good skimmer) . I also read of many bad stories, and opted out.
I then tried Seachem Phosguard, since I thought a the gentler phosphate scrubbing would be better, however that turned out to be a disaster since my P would swing up and down
as the media didn't last very long. Plus some concern about aluminum based product.
I then considered using Granular GFO (bulk-no-name-brand),
which does work but I remember clumping being an issue in the past.
So like you I started using RowaPhos (in a Two LIttle Fishies Reactor), and as recommended by LFS I started changing it
every two weeks (CONSISTANTLY). In my cases (Tank Size and BioLoad), 1-1.5 cups was the sweet spot to get my Phosphate down to 0.1, and keep there. (STABLE TOO)
I may increase the amount a bit to get below 0.1ppm (0.04-0.06ppm is my Target/Goal).
RowaPhos isn't cheap, but I like it's consistency. No rinsing needed... Doesn't clump. Water flows thru it evenly, and the capacity to remove phosphates (
at slow trickle), for stable P level is ideal for my setup. Changing every two weeks fits nice into my schedule.
I still run the Algae Scrubber, but harvests have drastically reduced since P has dropped.