douggiestyle
Aquarium Advice Freak
i recently tested my tap water against ro/di water and found that my po4 level in tap water is the same as in the ro/di water, 0.2 ppm. i repeated the test twice and got the same results. my filter system is new though ive run apx 30 gal through it. is this considered a low or normal po4 level? also my tank level is now at 0.1 ppm after running a phosphate sponge for 48 hrs. seems strange that my tank should have a lower po4 level than ro/di water or tap water. could the phosphate be coming from the charcoal polishing filter located after the di filter? is it advised to remove the filter after the di filter?
im all ears
thanks doug
im all ears
thanks doug