In the past I've changed the sand in my filter every year. Do I need to do this? I have not used a flocculent or other agent that I'd expect to "gum up" the filter medium since it was changed last year.
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In the past I've changed the sand in my filter every year. Do I need to do this? I have not used a flocculent or other agent that I'd expect to "gum up" the filter medium since it was changed last year.
No, it is unnecessary. Actually, sand that is a little dirty filters better than totally clean sand. The same sand has been in my filter since 2001 and is still filtering just fine. I expect there are a lot of other people who have sand that is much older than that.