Is rain water collected from a roof really that dangerous for an outdoor fish pond if added in small quantities (less than 5% water volume) or is it probably okay?
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uberbatman will be able to answer this
It is fine. I have a pond which gets more than 10% of it’s supply from my roof. Actually after a hard rain once they have even spawned.
@gooch so you have a “spawn pond” eh
@rag it’s a koi pond. But the rush of fresh water induced them to spawn.
As long as the roof is free of poisonous contaminants, you should be fine.
Rain water is fine. Animals and birds drink it all of the time Too.
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