Below sentence is correct to express when I am asking someone eighter have to change the total water or mix some fresh water by 2-3 days interval.
"How frequent needs to change the total water in the tank or addition of some ratio of fresh water into the existing water by two or three days interval is fine"
Your sentence does not make sense. Say eg Every 2 or 3 days you have to either change all the water in the tank or mix in some fresh water. Do you need to say how much fresh water should be mixed in?
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
Your sentence does not make sense.
Say eg Every 2 or 3 days you have to either change all the water in the tank or mix in some fresh water.
Do you need to say how much fresh water should be mixed in?