Quote:
Originally Posted by whatcaneyedo
Another issue you might have is kalk back syphoning into your ATO water holding reservoir. I bring this up because its a problem that I have been having and if your fresh water tanks are using the same reservior they could end up being supplemented with kalk too... I've tried adding a small check valve. It jammed open within a few weeks so I dont know what you can do to prevent this.
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I've used the new tunze check valve, it's worked well.
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MadamRedButterfly cam