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Potatohead · 08/12/2017, 01:46 PM

It only holds so much phosphate. If it removes a lot from the water it won't last very long but if the water is low in PO4 already it will last quite a while.

08/12/2017, 01:46 PM	#2
Potatohead Registered Member Join Date: Apr 2016 Location: Vancouver Posts: 1,596	It only holds so much phosphate. If it removes a lot from the water it won't last very long but if the water is low in PO4 already it will last quite a while.