Help with Reverse Osmosis water and Axies

[BadWolf]

Because my well water is off the charts bad, I absolutely have to use RO filtered water in my axie tank.
My well water tests ammonia so high it doesn't even register on test scale, it smells like rotting fish diapers some days and sulfur other days, and it leaves a thick mineral deposit on glass.
It's pretty much awful.
I have a six stage R.O. filter for drinking, cooking, and for my aquariums.

Up to this point, I've been using bottled spring water for the axies, but they will be ready for their adult tank in a few weeks, and I need to start the 40gallon cycling.

I know that RO water is bad for amphibians, but I have to use it, I do not have another choice.
So, how can I make this water ok to use with my axies?
I already have Seachem Replenish. Can I use that?
Is there a different product I should use?

 

[auntiejude]

Yes, you need some kind of remineraliser for axies - they like hard water, so you want to get your water to the higher end of the gH scale.

 

[BadWolf]

Thank you.
Do you have any suggestions on specific products (in the US) that I can use with axies. I'm not sure what I will all need.