Am going through at least 10 litres of RO a week but it is a 250L tank I’ve checked for leaks and seems sound. This is the first time I’ve struggled with salinity since starting in the marine hobbie over a year ago I do think that my auto top up sensor is faulty tho cos it will click on then go of and within five minutes it’s goin again I have to turn it off mid week while am at work to save the ro
Does your ATO have a check valve in it? The check valve would prevent back flow. Not saying that back flow is your issue but it could be a factor. It would be easily recognizable because your ATO reservoir might overflow if it sits lower than where the top off is adding water.
No I did have that issue at first when a got the new tank cos I’d never used a ato before and my first tank was a 60L but since watching video and stuff the RO chamber on the sump goes right to the top to prevent over filling n stuff and I monitor it every day just can’t understand why am getting unstable salinity. I’ve never had this my reading have always been 1.026 and it’s always been that. But Ano its effecting the tank now cos my corals look ticked off all the time luckily enough it’s been a gradual drop cos my blood and cleaner shrimp hasn’t moulted prematurely.
My display tank has stayed at the same level and I’ve got marks on my sump for running and off and it does drop past my mark a little but then the ato kicks in and puts it back level
So what am I doing wrong then I go to my lfs every week for my salinity and my water parameters checked on there machines and my parameters are fine but my salinity says the same as when I test at home I’ve never had issues like this before.
It’s not the check valve that would create a problem “that’s to stop a back siphon” it’s the siphon break that you need.. I use a tee on my tank cause the inline ones come with a tiny hole that gets clogged and then it keeps dumping fresh water in.
