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- Sep 21, 2018
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I think you have an algae problem not a phosphate problem. I know hobbiest at large equate the presence of phosphate with algae growth. i would propose that hobbiest reconsider their logic.I have used Rowaphos in past tanks as part of my normal maintenance using roughly 9 TBs in a 120 gallon system. My current build is testing at 5 nitrates and 0 phosphates, but I have GHA aggressively taking over the rockwork. How do you determine the starting amount of Rowaphos when you don't know your true starting phosphate values? I assume phosphates aren't truly 0....and even if they were, then using GFO wouldn't cause any issues anyways. It is a SPS tank so I obviously don't want to shock them and cause more issues but I need to get this algae under control.
On the reef, algae can grow in water that coral grow but algae is not to be found because of grazing. In the aquarium it is the same situation. There really isn’t a good reason to think you can control algae growth by tweaking the phosphate concentration. Algae can only be grazed or killed with algicides like Vibrant. Physical removal does not work because you cannot remove all the microscopic filaments adhering to rock surfaces. Growing coralline algae seems to work possubly because GHA cannot colonize a coralline covered surface. I propose that if there is too much GHA in your system, there isn’t enough grazing.