TLF Phosban Reactor 550

[artrye]

Ive been running the TLF 550 w/maxi 1200 with 1L of Biopellets since Jan. Its a great reactor but Im having trouble getting the pellets to tumble equally. I have to shake the reactor up once a day to get the pellets moving around. If I left it alone, only one side or a portion would move the rest would just stay. Ive tried a bigger pump, I have cut the sponge in half (better flow)but no luck, same result.