2 Little Fishies Reactor 150 at 106 and 250 GPH

[ottoman]

I think you need a maxijet 1200 at least. Also check your value, tubing and connections, make sure they are clean and clear, nothing blocking the flow. Some time a small pellet can be stuck in there.

[DCDN]

I use a MJ1200 with about a third of it full and it works great. Tumbling around really great.

[gobytron]

are you sure you have the pump hooked up correctly?

When I first got my TLF phosban, I put the line out to the pump and couldn't figure out why there was no tumbling...

Kicked myself when I realized that it was hooked up backwards.