Can I put 12x12 concrete blocks under my hot tub?

hot tubs 10 person image

heathercgi

Can i put 12x12 concrete blocks under my hot tub. We just bought a 10 person hot tub. We are putting it in our backyard and we don't have concrete slab anywhere. So, can we lay down 12x12's down?? They look like they are like 2-4" thick? I think the hot tub is like 8by8. Let me know. We don't want to lay down concrete.

Answer
I have personally done this and everything worked out fine. Make sure your bedrock is good and like the others say, like a couple inches of gravel down before you set the blocks. Hope this helps!

How long does it take to heat up a 250 gallon hot tub? I just bought an inflatable hot tub from Meijers.?

cass007

I just bought a portable hot tub from Meijers and was wondering how long it takes to heat it up to 104 degrees. I have the filter and heat on to 104.The size of the heater is 1000 watts. The tub only cost $500 and holds 250 gallons. I have had the pump and heater running for at least 10 hrs. and the temperature is only 65 degrees. One person told me it could take about an hour a degree. Is that true? HELP!!

Answer
1000 watts equals 3400 BTU per hour.
1 BTU will heat a pound of water 1 degree F in 1 hour.
A gallon of water is 8.33 pounds.
You have 2082.5 pounds of water in the tub.
It will take 2082.5 BTU/hour to raise all the water 1 degree F per hour.
It should take about 40 minutes to raise your tub 1 degree.
This does not take into account heat loss through open top, heat loss around sides, heat transfer losses, etc, so it may take longer.

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Title Post: Can I put 12x12 concrete blocks under my hot tub?
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