Is rain water bad for fish in a small garden pond. The reason I ask this is
that every time there is heavy rain, the water turns even more murky and the
fish appear lethargic. I put salts in to pep them up a little, but this only
helps for a short while. (Is it possible to overdose with tonic salts, or
can I continue to put it in reasonable amounts?)

Also, I have lost 2 small sarasa comets with what appears to be light green
marks on their underbelly. The pond is murky green, even though I have used
interpet 'green away' and sludge blaster.

Any answers will be welcome.

Thanks

Alex