pond filters - a newbie question
I have a Genie max filter and a lotus pump. I have installed this in our
very green pond. After a week it was making good progress in reducing the
algea. But now it seems to be coming back - I got no instructions with the
filter. (other than don't switch on the UV for 4 weeks) Do they need
cleaning, the filter material replacing at intervals or what?
Nick
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