Little Giant 566535 Air Pump

This is not an inexpensive product, as aquarium air pumps go. I paid about $50 for it including shipping. It was the only pump I could find that I could attach an inlet tube to, in order to draw aquarium air from outside (I had lost my favorite fish to indoor air pollution when a floor was refinished). When new, the air output was adequate, but barely so. As time went by, this declined, until after 15 months air was barely dribbling out of the airstones. I thought the small foam filter at the outlet might be plugged, but removing it entirely did not improve performance. I then measured the output pressure with a gauge. It registered zero. In contrast, 3 Tetra air pumps I had that were much older (and cheaper) measured 0.75, 1.1, and 2.1 psi. I have figured out how to add an inlet tube to one of the Tetra pumps, and will go that route. Since the Little (VERY Little) Giant cannot be opened up to be serviced, it is now basically junk. There's a good grounded power cord I can salvage from it, but that's about it. My advice: don't buy this pump.

We have a small pond, a fountain really (~40 gal), with a number of gold fish in it and wanted to help them winter over. Got this pump to use as a "bubbler" (submerged) in combination with a 100w heater. When it's thawed here we see our fish still moving, albeit slowly, so it's worked well for our needs.

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All of the pond advice says to have a pond heater/de-icer and aeration to maintain a hole in the ice for the fish. I live in Minnesota. Currently the temperature is -9 F with a predicted high of -3 and the wind chill is approaching -30 F. This is supposed to last for a few days...

The de-icer is frozen in the pond, but the Little Giant submerged about 2 feet in the pond is blowing air and the ice has still has not completely frozen over above it. While I will not know if the fish make it until spring, I am completely satisfied with this air pump and next year, I will not be using the de-icing heater all I would take it out now, but it is frozen in place until the ice thaws.

When I set up the pump, I submerged it in the water and ran the air line under the deck near the house. I even placed a plastic cup around the open end of the air line to make sure no debris would clog the opening. This seems to be the key to operation in extreme cold temperatures: submerge the pump and protect the air line intake opening.

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I bought this pump in 2011 and used it out of the water to pump air into my pond. The line froze during the winter of 2011 so in 2012 I put the pump in the water (this is an option per the pump instructions). Now the pump doesn't work at all. I can't see a way to take the pump apart and try to repair it. I can't find a way to contact the company directly...

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I've had mine for two years, and it quit producing air, although it still runs. There are no replaceable parts.

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