I would consider swapping the "air filter" shown in your link to a round paper style filter like you see on old compressors. That one looks like it would clog up pretty quick...just my 2¢. Otherwise, the pump should be just fine and you found a good price on it!

15 minutes to start and double daily is the rule of thumb UNLESS you smell "the stink" and then most will hold that day and try again the next to keep advancing.

As far as running at night...this may just be my odd pond, but I have found that I get the best DO levels running 24/7 until my water heats up to the low to mid 80s...then I cut back to running at nights until the daily high temps back off. This does drop the DO levels during the night-time-only periods, but I believe it's better than cooking the fish. My pond seems to have low DO levels to begin with so, I try to maximize that rather than keep lower more comfortable temps.


Fish on!,
Noel