When it comes to phosphate reducing media, it can be expensive. I've tried everything under the blue moon I think at this point for it. So far the best in my experiences is either GFO
or phosguard. Both have their cons, where GFO
can clump up and phosguard can be used up in couple of days rather than a month if the phosphates are really high. A steep drop in phosphates like that can be just as deadly as the rise to SPS
, like you are experiencing IMO
Have you tried ordering in bulk? Bulkreefsupply just finished a weekly deal on their signature media where I ordered bulk GFO
and activated carbon.