API 14-Day Pyramid Automatic Fish Feeder

We needed something to last for nine days while on vacation. There was still a little left when we returned. We have a 35 gallon aquarium so use your judgement. Very happy that all of the fish were still alive. We will purchase this product for future trips.

This kept my fish alive for two weeks, but be prepared for an enormous nitrate spike!! Nitrates in my healivy planted tank were always 0 or near 0, but after returning from vacation they were measured off the chart (>160 ppm).. AFTER an 80% water change. Consequently it took several more large water changes to bring the levels down, and the whole interior was absolutely coated with algae. My fishes' fins suffered as a result.

Being gone for two weeks, I was right on the edge of being able to let them go without food or risk losing fish, so I decided to be safe. I do, however, wish I'd have invested a little more and got an automatic feeder. I can't fault the slow-dissolve pyramid completely because no fish died, but it definitely caused problems. My opinion is this thing is more trouble than it's worth. If it's truly meant to be "seven days" (the package says 14 days on the back), then it's not necessary anyway because most mid-sized or larger freshwater fish can live safely for at least a week without food. If you're going to be gone much longer than that, get an automatic feeder!

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I guess it works fine. I've gone on numerous 3-5 day business trips and the fish always are alive when I come home. I've got a 20 gallon tank with some tetras, hets, a couple frogs, a pleco and some loaches. So far so good!

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This is going to work well for my classroom fish tank during spring break. Just watch out for the sellers. Read their reviews carefully. Not all sellers are the same.

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Put one of these in a 20 gallon tank with 5 fish and went on vacation for 7 days. When we came back, the pyramid was a little more than halfway dissolved (covered in tiny snails that live in the tank) and all of our fish were still alive. I had been skeptical it would work and am happy to report no problems. The tank seemed a little cloudy, but I would use it again in a heartbeat if we're ever in a pinch and can't get anyone to feed our fish.