MP10 not pushing much water ,, options ?

[kengeroo]

So I have my tank setup, Redsea C-250...
I slapped a MP10 into one end of it.

I tried every mode and can't get a decent wave..

2 questions,,,

1) MP10 max glass thickness is 9.5mm , mine is 10 mm,, will this be an issue ??

2) to get a wave going should I replace the MP10 with a MP40 ? or get a second MP10..

Ecotech rates the MP10 for 50 gal,, my tank is 55 gal,,,
will getting 2 MP10's bump up my rating to 100 Gal ???

I'm thinking if yes,, then 2 MP10's will give me more flexibility,, but if they are too puny than I'd rather get a MP40

thoughts ??? thx