Why Wall Turn white with Sodium Bicarbonate Options

[white horse T1]

somehow whenever i add sodium bicarbonate to the pail i used to age overnight with anti chlorine/chlormine treament, my tank has traces of white coating the tank wall and even the sponge. but they got dissipated after a day in main tank

why? is it that i put too much or the sodium bicarbonate did not dissolve properly?

[Allan]

Following advice from the bros here I no longer age water, but mix my aqua+ in the jelly can before it goes into the tank.

Treating your tap water seperately first is always good, but I often apply anti-chlorine after the tap water gets into the tank (with the fishes inside.) I had been wondering if that's okay, ie, short-term exposure to chlorine. I'm glad I was told goldfish is a lot tougher in this issue than they were sometimes made out to be. It's unclear how short the short-term is but I take it as less than 10 minutes max as that's about the longest I ever waited before apply anti-chlorine and my fishes are fine.