From my research bio pellets won't get rid of ur phosphate problem, it's Mainly nitrates. If u want a cheap alternative to bio pellet, vodka dose. My nitrates were 20+, and after a month of vodka dosing, it dropped to 0-5. Also my phosphates went down, but I run gfo to get it to 0. Get a syringe and start by adding 1ml of vodka and slowly ramp up till ur nitrates read 0. Just make sure u ramp up slowly. Otherwise u could have a bad algae bloom.
Sent from my iPhone