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post #1 of 6 (permalink) Old 02-28-2008, 11:52 PM Thread Starter
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RO w/ PH

So i might try using RO to lower down my PH i have a 20 gal long and i was wondering how much RO do i need including tap water? Just adding this now will it affect my shrimps as it brings the PH down? do i have to add it lightly and gradually or can i add it as if i was doing a reg water change? What i meant about how much RO and tapwater was that i do 35-40% water changes do i need half RO and half tap to refill my tank?
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post #2 of 6 (permalink) Old 02-28-2008, 11:56 PM
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How much RO you need would depend on how much you want to lower the pH, and what your tap water started at.

That being said, I would do it gradually, especially depending on what kind of shrimp you have. I keep my tiger shrimp in a 50/50 - 60/40 RO to tap mix, but I have very hard, high pH (8.2) water. I would think you would be ok to do a 50/50 mix of tap and RO on your next water change, if that is what you want to bring your pH down.

72g bowfront: 7 x angelfish, 3 x albino bushynose plecos, 2 x otos, 2 x botia striata, 1 x school rummynose, 1 x school cardinals, 1 x male betta named Patata
92g corner: 4 x peppered cories, 2 x lonely discus, 1 x school rummynoses, 1 x school cardinals.
Also..shrimp, discus, angelfish, and now a Tanganyikan cichlid tank.

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post #3 of 6 (permalink) Old 02-29-2008, 12:05 AM
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Wow..I've never ninja'd someone before.

72g bowfront: 7 x angelfish, 3 x albino bushynose plecos, 2 x otos, 2 x botia striata, 1 x school rummynose, 1 x school cardinals, 1 x male betta named Patata
92g corner: 4 x peppered cories, 2 x lonely discus, 1 x school rummynoses, 1 x school cardinals.
Also..shrimp, discus, angelfish, and now a Tanganyikan cichlid tank.

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post #4 of 6 (permalink) Old 02-29-2008, 02:51 AM Thread Starter
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i only have cherries my PH is 7.4 and i would like to raise crystal blks and crystal red shrimps as many people have told me my PH is too high to maintain them and i need 6.8 - 7
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post #5 of 6 (permalink) Old 02-29-2008, 06:06 AM
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That sounds fine to me...you could probably do it over two water changes...each time adding in half RO/half tap. I wouldn't imagine it would take much to lower the tank that .5 of pH, just two water changes or so.

ETA: but gradual is always better than sudden pH changes, so small changes are good.

72g bowfront: 7 x angelfish, 3 x albino bushynose plecos, 2 x otos, 2 x botia striata, 1 x school rummynose, 1 x school cardinals, 1 x male betta named Patata
92g corner: 4 x peppered cories, 2 x lonely discus, 1 x school rummynoses, 1 x school cardinals.
Also..shrimp, discus, angelfish, and now a Tanganyikan cichlid tank.

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post #6 of 6 (permalink) Old 02-29-2008, 06:21 AM Thread Starter
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Quote:
Originally Posted by crisrisl View Post
That sounds fine to me...you could probably do it over two water changes...each time adding in half RO/half tap. I wouldn't imagine it would take much to lower the tank that .5 of pH, just two water changes or so.

ETA: but gradual is always better than sudden pH changes, so small changes are good.
by smaller water changes i would do maybe 20%? half tap water half RO and wait a few days? or wait till next week to do another water change?
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