Sure, buy a simple home RO unit. If you get one for your kitchen sink then you can store your fish water in five gallon buckets. You'll want to mix back in a certain amount of tap water to get the right pH, TDS, microsiemens whatever.
Forewarning: this is a big PITA, you will learn to dread water change days. I gave up on this and just went to larger percentage tap water changes with a Python. For just keeping vs. breeding your tap water is your best best. Plants and bog wood can help improve the tank environment by sucking up some nitrates and softening the water a bit.
Eric
Forewarning: this is a big PITA, you will learn to dread water change days. I gave up on this and just went to larger percentage tap water changes with a Python. For just keeping vs. breeding your tap water is your best best. Plants and bog wood can help improve the tank environment by sucking up some nitrates and softening the water a bit.
Eric