Gourami killed by powerhead!

Actually, I have more than 127gph in my 10 gallon tank.
Keep in mind, its not just the flow rate; the functional size of the media is very important to your tank size/ bio-load. 127gph doesn't seem nearly enough for a 46g.

My 20g has about 400gph and the 55g about 640gph turnovers. Both are 1/2 HOB, 1/2 cannister.
 
I have a Power Filter on that 46 gal, which provides some water movement & aeration. I've had nothing but the power filter for months with perfecty happy fish, I added the powerhead cause it just seemed there wasn't enough movement.

BTW I've had that tank for about 4 months.
 
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