Yeah that is pretty true depending on what you want to do.
I want temp, light and tunze control. Beyond that it's just extras.
I won't choose the ghl doser over spectrapure due to it only having 3 rollers and not 4 and it's likely less risky to use a ranco and tunze 7095 since they are simple and tried, tested and true devices. Lighting I could find some digital timers...don't need diming. Also plan on dosing so I don't really think measuring ph is all that big of a deal either.
But still it is a pretty slick unit and I'm not crazy about home depot light timers. It's going to be a tough decision.
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