My phosphates have gotten rather high after ignoring my test results for awhile. Ive been dosing silicates and need to bring my PO4 down at the same time. Is one product better at removing PO4 while still having alot of silicates in the water. I understand both GFO and Phosguard remove both silicates and PO4 but i was just wondering if one would be better than the other in this situation.