Some years ago I installed a 55 gallon rain barrel just outside my fishroom. Have never used my RO unit since. A 50% water change with rain water (my tap water is very similar to yours) has worked very well for spawning several corys.
-Shane


Thanks for your response Shane. I am just worried ...

Thanks, I will sell my water softner and buy another ro unit to make more water quicker.

Use the RO unit. Do not use the salt water deioniser as it will make your product water salty as it swaps other 'hard water ions' for sodium to make the water soft - what you want is low tds water which is what a good RO unit will do. In my experience you are unlikely to need to the DI unit after ...

I will start by saying I am new to breeding corydoras and understanding water parameters. I am 17 and have been keeping fish for just over a year. I currently have a wild group of cw127 and wild group of pantanalensis. My tap water is ph7, kh8, hardness 140ppm, tds 240ppm. I have a salt based water ...