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I wholly agree in algae as the best method along with aggressive skimming. Since I removed my GFO and increased algae my nitrates and phosphates are more balanced and consistently low even with minimal water changes. If/when algae growth slows nutrients other than nitrates and phosphates can be the limiting factor. Either large 25-35% waterchange to replace elements or dosing of an plant food such as iron or use of Triton core7 dosing can replace missing elements.The problem with phosphate removers is it's so easy to overdose. They also tend to pull out trace elements. While many don't feel it's applicable in the reef tank I believe in the Redfield Ratio. By completely removing phosphates it throws the nitrates off balance.
Algae is a great method, it won't pull too much and you can even reduce/eliminate a ph swing when you run your lights on an opposing schedule.

