up vote 0 down vote. You can nest up to 7 valid or invalid entries. If you need to have more than that you should perhaps designate a column for your black list of entries that you can add to when an occurrence causes a count that you don't believe should be valid.
So how much does a float tank cost? Float tank prices vary widely depending on the size and the features of the float tank or pod you want to buy. Expect to spend anywhere from $12,000 to $40,000 to buy each commercial-grade float tank needed in your spa.
The Super (291 cubic foot) tank will inflate about 550 balloons. This tank costs $214.00. This price is the actual cost of the helium in the tank and is charged each time the tank is replaced. The Extra Large (219 cubic foot) tank will inflate about 425 balloons. This tank costs $179.00. As with the Super Tank, this price is the actual cost of the helium in the tank and is charged each time the tank is replaced. LONG TERM TANK RENTAL FEE: $6.50 per month per tank. Rent is billed quarterly or yearly.