We have a large spa (2.6 metre square) and this is all we need to clean it. It has a powerful enough suction to vacumn up all the sand and dirt that settles on the floor of the spa. It's actually quite quick to clean this way. I get the leaves out first with a net, then a quick vac with the Telsa 05 and the whole thing is spotless is under 20 minutes (BTW: I heat the spa to vacumn it then relax once its done :) ).
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