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 Post subject: Air pump vs Water pump
PostPosted: Feb 14th, '18, 07:17 
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For only oxygenation, which pump type is better?

Air pump which pumps large air bubbles in the water or a water pump which helps circulate the water around and swishes it back into itself? Given the water pump will push water out of the tank, through the tube, and back down from above the surface.

Personally, I think air diffuse stones get clogged fairly easily and are prone to require more often maintenance.

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PostPosted: Feb 14th, '18, 10:51 
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If your water pump fails, you need an air pump to keep the fish alive, so IMO it isn't a case of one or the other, having both is the best plan.

In quite a few years of operation, I've never had any of my air discs get clogged. I'm not sure what they would get clogged with, since they only have air going through them.

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PostPosted: Feb 15th, '18, 00:17 
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But your point is essentially "if one pump fails, replace it" is the same for either pump. Bacteria and algae can clog air stones easier than they would a water pump I would think....? Is the main different cost of operation then? Or does water splashing infuse more dissolved oxygen into the water than the bubbles from the air stone?

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PostPosted: Feb 15th, '18, 04:20 
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A 30W water or air pump will have about the same cost of operation.

An airstone could become clogged with algae if underwater and not in use, with enough light on it, but if it's not too hard to clean if needed. Water pumps could become clogged with detritus - leaves etc, uneaten pellets, dead fish etc too.

As for which gets more O2 into the water, it probably depends on the splashing, but remember that lots of aeration also happens in the GBs. However, I assume you are going to have a water pump anyway? An air pump is a good backup for a problem with a water pump, and if battery powered, could save your fish in the event of a blackout.

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