My apologies, I should have mentioned that you said they were just for a visual cue to see what the water temperature is doing.We do use these on every system but it is NOT what we rely on to control the temperature in the tanks. These are for a quick glance for our team to check to make sure everything is good. We control the temp with two different commercial probes. We also have a backup Neptune temp probe for alerts and a third source for temp.
also, @Salty_Northerner what is that Zoanthid called in your profile picture? I like it.
And the zoa's in my profile picture are my what they call Constellations here in Canada. They're a beautiful zoa and add a lot of contrast to the system.
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