water exchange and ph

[efishency]

hello

i have had a few issues with ph in my tank. the water out the tap was great when i measured its ph before making a water change, but then the tank water went up by 0.5 the following day when i added it to the tank. apparently this has to do with co2 degassing, as i understand.

so i have been trying to find other sources of water, including mountain spring water and commercial mineral water. i let them stand overnight and as expected the ph rose, sometimes by even 0.8. all these water were KH 10+.

will the ph always rise in the tank if i add water (tap, spring, commercial) that has ph increases overnight, despite high KH in both tank and new water? is there anything to do to avoid this?

Thanks!

 

[skillzizzo]

From my understanding if you let it sit before you add it to the tank you need to airate it. I do not use aged water but seems like the people on here that do. Put a air pump in it

 

[Laticauda]

Get a large trashcan or food-safe barrel, or tub to put your water in for your water change. Add Prime (or whatever dechlorinator you have) and an airstone/powerhead. Let it aerate for at least 24 hours before adding it to your tank.

I do this with my brackish water, and have a heater inside the tub, so the tank water + tub water are the same temperature, and I can just drain the tank, and add the new water.