emergency

Hello everbody! I just made an account here after lurking for a longer time now since I'm having an emergency here. I have two tincs which have been getting along rather well so far. One of them is about a year old and is doing fine. The other, younger one is rather tiny and has been doing...

i put the pump from an exo terra medium waterfall int my hydroballs layer but my hydroballsare only an inch high...not even covering the top of the pump. will the pump still get enough water or must i take out everything and redo it differently? if u read this please reply...any answer is better...