"Ann in Houston" wrote in message
...

Watch the hardness as rain water can make the water too soft and even
acid
depending on where you live (acid rain). Also it has no buffering
capacity. A PH crash can kill all your fish.

What do you do after a heavy rain? Large water changes?
============================
Nothing. We seldom get rain heavy enough and long enough to drop the PH (or
hardness) much. The PH is as high as 8.2 here so getting enough rain to
drop it to or below 7 is unlikely. When that days comes I'll start building
an Ark. :-))

You said the tank was "full of rainwater." Fish can't live in pure
rainwater.

--
RM....
Frugal ponding since 1995.
rec.ponder since late 1996.
My Pond & Aquarium Pages:
http://tinyurl.com/9do58
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