Nemodao
Aquarium Advice Apprentice
- Joined
- Mar 23, 2014
- Messages
- 41
I'm about to start a saltwater tank and I'm going to by an rodi unit. How often do I need to change the membrane and the filters and the deion unit. I know that you should change it when the TSS level passes one but how long does that generally take? I would do a 7 gallon water change a week for a 45 gallon tank. So how long will it take before I change the things.