I'm guessing everyone will tell you not to add tap water straight from the hose...but as long as you're not adding more than about 10% of the water volume, you shouldn't experience a fish kill. I currently have a small 1' kiddie swimming pool on my back patio filled with water plants I'm waiting to plant in my pond...I've been topping off the water daily with the 107 degree temps here and the plants look great...didn't think about the tap water issue until I read this post.

Sorry to hear about your bad luck too Dave...hang in there.

Last edited by Eastland; 08/19/23 06:56 PM.