The Helix only has one probe so it will give all the uth the same power a the one with the temp probe. If they are different sizes or just have a big temp differences between your uth I doubt it well run them at the same temp. If every variable was the same in every tank it should work but the only way to see is to test it. Take your animals out if you do because you have no way of knowing what the uth will do running that way.
The Herpstat4 controls four items and has a temp probe for each so each device is accurate. Its $340 on most websites.
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