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.
1 Most helium tanks that can be purchased online are disposable. 2  Most can fill 50 â 100 balloons and will hold up to 14 cubic feet of helium. 3  On average, a disposable tank is going to cost anywhere from $30 to $65.