Has anyone tried using the heater from their portable/inflatable hot tub spa to heat their above ground pool in the summer? The GPH is ~350-400 so its too weak to use as the only filter to keep it clean.
That spa heater won’t do anything.
It is 120V and probably 15A. That’s 1800 watts max which is 6,142 BTU/hr. Smallest reasonable heater for a pool is 128,000 BTU/hr or about 20x larger.
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