My husband and I recently bought a potable spa, we have had it for 4 months and the hottest it will go is 102 degrees, my husband would like it a little hotter. My question is does anybody no where to get a portable heater to put in the spa? We called the manufacturer and they said that the spa could hold up if there was an extra heater, but i have looked everywhere on the net and can't find anything that we can use. All that I have found are hot tub heaters, nothing we can put in the spa. If anybody can help that would be great. Thank you in-advanced for any answers.