Comments:
This powerhead was too much flow for my 46 gallon tank. I had to position in such a way as not to disturb the sand bed too much (as in creating a massive sand drift), and food moved so quickly that the fish had trouble catching it (to which I began to unplug it during feedings). Despite all that, I am really impressed with the Koralia series, especially the integrated magnet design. I now use this one my tub I mix salt water in, and leave it overnight--no worries about mixing or oxygenating the water.
One other note, I read many comments around not using these with a wave maker and I can tell why. When they start up the impeller puts force against the front guard, and takes a split second seat while making a bit of a rattling noise (seriously all in less than a seconds time, then near-silent operation). I had one case where the front guard jumped off, though I didn't check to make sure it was tight either. In any case, I would recommend these for constant flow only.
Yes, I would recommend this product to my friends.
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