Pottsy - Interestingly enough, there are no specs that came with the Rena 400....just that it was the only pump that PetSmart had that was rated to 96"(ie a deep air pump according to them). There are no kinks, I have double checked that and there is no leakage....it just does not pump enough air. I have disconnected from the air stones and just a few bubbles come out of the two air lines. My son will be installing an aquarium soon, so I guess I will be making a small donation for his application.
Regarding the GAST air pump, in my hurried reading of the posts that were referenced, I did not notice any reference to the noise level it creates....also, since I have electricity to the edge of the pond, I assume I could mount it there as long as it is protected from the weather.
Sure appreciate the comments and suggestions. Will eventually get something worked out.
