RO Water

i found a place that sells RO water and it no to expensive for me, i want to use it when doing water changes, when i do water changes i uually change 40liter, my idee was to replace the water with 10liters RO water and 30liters tap water. Im going to buy the product to add trace elements back in to the RO water

 

why do you want ro water? all the fish you have will be fine in normal tap water treated with prime.

 

by mixing with tap you put back some minerals anyway, so no need to buy any trace minerals etc. But yes, most fish will do fine in just normal tap water. Another thing is that if you really want to soften your water you would more likely go with a mix of 2/3 RO and 1/3 tap. Let it age, no need for any minerals etc (thats why you mix with tap) and could maybe add some seachem safe if you have hich chloromines, aging will usually get rid of normal chlorine by itself.