Are under gravel filters any good?
I wouldn’t use them in the way they were meant. Get a canister filter, and pipe it in so that the output goes into the under gravel filter. That way, nothing sits in the under gravel filter, and the waste in the gravel will be pushed up and sucked into the filter. It is called reverse flow under gravel filter, and it work great. Or you can just get a canister filter, or a hang on back filter, they both work good. You should do regular gravel shiphons, to remove the waste. An under gravel filter keeps the waste in the water, and keeps the water dirty, no matter how often you do water changes. I would not recommend getting one to use as it is intended. Technology has evolved way past the use of regular under gravel filters.
