Originally Posted by johnny151
how do you add new water to a 10 gallon tank once performing a 20%-50% water change? do you put the new water in the tank and put in water conditioner? or do you have to sit it out with water conditioner added for a day then add the new water?
long story short, i recommend conditioning the water and then adding.
long story long, youll need less conditioner if you condition it first. but you dont need to let it sit for a day. water conditioner works right away. however ive heard that you can set your water out for a day and not use any conditioner at all because the chlorine combines with the oxygen and "evaporates"
if you condition the water after adding it, first off take the fish out, because youre pouring chlorine into their mouths, and remember to treat for the whole amount of water not just wat you added. so if you do 50% water changes and add the conditioner before, youre only using 5 gallons worth, whereas if you add then condition, you would have to remove all your fish and use 10 gallons worth of conditioner.