DIY passive Solar SPA heater

rin67630

Solar Addict
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Here is an easy hack to add solar heating to an Intex SPA.
It does not need any pump, but just derives a part of the filter water stream into a loop of electrical corrugated conduit that runs through a greenhouse box.

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And it works quite well:
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The spa heats up twice as fast and can be heated when covered as well.
 

rin67630

Solar Addict
By the way: this isn't the only hack.
With another piece of PVC pipe, two stainless steel scourers and some length of sprinkler hose i made an underwater vacuum-cleaner.
So you can aspire all the debris that gathers in the bottom of the spa into the scourer filter and clean the Jacuzzi at a breeze.
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After cleaning rinse the scourers under water:
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