Hi guys so i have been having a slight high reading of 0.14 with Phosphate and i was using a small amount of Phosguard..4 days later checked 0.14, so i took it out and added a large amount of Phosguard now 4 days later and after a 12.5% water change it reads 0.12… Why is it not going down? Everything is doing great but the HANNAH says its High. Any recommendations… oh it is a 100L tank with built on filtration.
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