Yeah... That's why I opted for the 4... Although I only have 2 solo tanks at present, it'll eventually be running 1 rack for my sand boas / hognose and 1 rack for BPs, plus a couple single tanks that I may have setup. It was cheaper to buy one herpstat 4, than to buy 1 herpstat 2 now and have to buy another in a year or so when I get the racks setup.
Just make sure you do not exceed the wattage per plug and total unit wattage (I believe it gives the stats on the spyder electronics website).
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