Mixing RO and Tap

[Brotoss]

Curious about mixing RO and tap for breeding but if my RO water is a pH of 6.0 and my tap is 7.5ish and if i mix them together 50/50 i get a pH of 7.0ish won't the pH swing kill the fish if i add the mixture right before the spawn? How do you guys do it?

[pitdogg2]

You could start with 75/25 and work to 50/50. I used calibrated electronic pH pen. Most of the time it showed pH of 7.0 because RO has equal amounts of nothing in most cases. This really was a false reading and as you start mixing you'll see different readings, but your hardness will be much less. In my experience i have not killed any Discus with that kind of drop. Go slow if your worried its not a race.

[Brotoss]

Thanks, so an immediate pH swing of about .5-1 would not hurt the fish? I'm just scared that the fish may die from a pH drop

[pitdogg2]

Thanks, so an immediate pH swing of about .5-1 would not hurt the fish? I'm just scared that the fish may die from a pH drop

Not in my experience. I have had bigger swings than that with not a problem. But with that being said my swings did have the same mineral content. Yours will be a swing with less mineral content.
I think you should be good

[Brotoss]

Not in my experience. I have had bigger swings than that with not a problem. But with that being said my swings did have the same mineral content. Yours will be a swing with less mineral content.
I think you should be good

Thanks!