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More problems than benefits
posted 5 years ago
I used to love undergravel filters. I had them in all 10 of my tanks and they kept the water relatively clear. The problem with undergravel filters is the ability for water to flow evenly through the gravel. When placing gravel over the filter, tiny gravel fragments can get down into the slits in the plastic where water is to flow which restricts its flow. Also if your not using a powerhead on the riser tubes then your probably not creating enough of a suction under the filter to pull water down. Water will also come down more near the riser tubes where the powerheads are then towards the middle. Another problem with undergravel filters is the fact that the fish feces then gets sucked down unerneath the filter plate where it collects. When you use a gravel cleaner to clean the gravel your not able to get the feces under the filter plate which builds up over time. Another problem is if you use live plants in your aquarium the roots will go down into the slits of the undergravel filter and block water flow there. The roots can also grow towards the riser tubes restricting flow there as well. The problem then is that feces builds up under the plate and stagnant water can collect under the filter. Live plants also dont do well in tanks containing undergravel filters. I've tried using reverse flow in undergravel filters thinking that feces wouldnt build up or clog the undergravel filter but evently it does. I no longer use undergravel filters in my tanks and Ive had better results with just using a hanging filter and sponge filter hooked up to a powerhead. I'll never go back. I'm not saying that undergravel filters are bad but I think that an aquarium can do better without them. Also without the undergravel filter your able to vac all the feces out of the gravel and live plants do better.
Pros: filters water through the gravel in your tank
Cons: can easily become clogged and produce anaerobic conditions in your tank
2 of 2 people found this review helpful.
I still like undergravel filters ...
posted 5 years ago
I still like undergravel filters, after twenty-five years as an aquarium hobbyist. They're reliable, easy to maintain ... just partial your tank on occasion and tumble the gravel and the filter does the rest. Develops a biological filter bed that mimics what fish would have in the wild ... add a power head to the tops of the bubble-tubes for larger aquariums and your aquarium will stay crystal clear.
Pros: I still like undergravel filters ...
Cons: Non found.
5 of 5 people found this review helpful.
posted 4 years ago
Before I started using power filters I used these in all my tanks with air pumps. They worked well but after a few years I started using power filter instead. For maximum cleanliness both types could be used.
Pros: Easy to use
0 of 0 people found this review helpful.
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