Filtered Water or Tap Water for water changes? - The Planted Tank Forum
 
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post #1 of 3 (permalink) Old 11-08-2004, 10:08 PM Thread Starter
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Question Filtered Water or Tap Water for water changes?

What is the best water to use for Water Changes?

Is declorinated Tap Water OK to use for water changes?
- Should you declorinate the water chemically or let it sit for a couple of days?

What about RO water?
- Do you need to add nutrients, minerals, etc. back into the RO water?

Tim
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post #2 of 3 (permalink) Old 11-09-2004, 01:10 AM
 
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I have been filling 1 gallon bottles with tap water and adding 10 drops of dechlor and then letting them sit with the tops off. At least over night. At first I did this without adding dechlor. But after the water sat for 24 hours I guess the water still had chlorine and my fish got ich. Now I just add 10 drops to every gallon and have not had a problem since. It kinda of sucks because it takes time to fill the bottles and I guess its overkill, but it has been working great. The fishies seem happy. I used to fill a big bucket with five gallons of tap water and add half of a tea spoon of dechlor just before I put the water in the tank. This worked fine too.
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post #3 of 3 (permalink) Old 11-09-2004, 04:59 PM
 
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dechlor'd tap water is fine for water changes. R/O water would be better for top offs due to evaporation, since only H2O evaporates...leaving all the mineral/hardness behind. If you kept topping off with tap water, you'd eventually have very hard water in the tank.

It should only take 5-10 mins for a dechlorinator to remove chlorine and chloramine from tap water. Prolonged exposure (hours/days) to chlorine/amine will harm fish and plants..but short term causes no problems. many of us with large tanks add fresh tap water directly to the tank, and then add the dechlor to teh tank near the filling point. I've been doing this a while now, and zero problems.
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