yellowish discolored water

Hi! I'm just a homeowner looking for help! Five months ago we had an HTP Phoenix 76-60 stainless steel hot water heater installed, but only about a week ago we started seeing discolored hot water (pale yellow-green) when running a bath. Cold water was clear. We have a whole house sediment filter...

Today I bought a brand new 30 gallon electric water heater and had it installed two hours after installation I checked the hot water and it was having no problem producing and maintaining hot water. My problem is that ever since the new hot water heater was installed all running water is now...