Well, they definitely work very well. Over the summer, I let my tank go a bit with less water changes, and my UF-20 ran low on bio-pellets. My N03 got up to 50 PPM (I was shocked), as I hadn't checked it for a while.
I filled up my UF-20 with bio-pellets (1000 ml bag), along with some heavy MB7 dosing, and the N03 went down to zero in 3 weeks, with no cyano or any other adverse effects on my tank. When I first started using bio-pellets, it took me 6 months (I started off a little too gradual) to achieve that.
|