Out door aquarium questions.

[aussieman57]

I 2 outdoor patio ponds. 42g each, both half-cut wine barrels with pond liner. One has rosy barbs and one is just collecting rainwater. I need to trim the edges, but holds water just fine. Among others, kendragon is a pond master

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Any pumps or filtration with these?

 

[The Masked Shadow]

No, as there are lots of plants and little amounts of fish.