Can't get my reactor to work properly

[woodzy128]

I bought a two little fishes kalk reactor. The sprinkler head doesn't spin and the stem gets tweaked to the side when the pump turns on. I got it working but it only worked for a day, then back to the same thing. I'm wondering if I should shorten the stem. Or if my pump is too strong I can put a ball valve on the line to slow it down. I'm not sure about this reactor!

 

[trido]

You probably have too much kalk in the reactor causing it to more or less solidify in the bottom between stirrings. Pictures would probably help in this case.

 

[woodzy128]

I only have 1/2 the amount they told me to put in it. I don't think thats the problem. I have a feeling the down tube is to long. This reactor is a cheap point of sale! I guess thats why it was 1/4 the price of all the other ones.