Re: Guppy fish
David, you're not trying to grow water based CP are you? With fishes, I recommend, U aurea and/or U gibba. As the fish produces urea, they'll fill your pond in no time. Both U makes pretty good mulch for plants hehe.
Marvin is right, overfeeding will kill them and lots of feacal matter. Lim is the expert here. Maybe you might want some exotic ones which will cost about RM50 a set (2M1F)
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