wave , fans, dont know

[Dave Zale]

looking for a replacement fan for 30 gallon coral tank, already have a hydor425 on one side, but looking for one for the another side, there stuff i barely get 2 years out of, they keep shorting out, not finding alot out there, ones that do look good, people are saying to strong, so any help with this would be great, was thinking of putting my nero 3 in there but maybe too strong...thnxs ahead of time for the help

 

[Saltyreef]

I assume you mean a powerhead...
I have had a single mp10 in as small as a 14g. No issues. Id suggest one of those.