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.
Buying a tank at a pet store may also cost more than buying one at a store such as Wal-Mart, but that all depends. The cost of a fish tank depends on the size and how much equipment one intends to purchase such as filters and pumps. A smaller tank is as low as $25 whereas a 180 gallon tank could cost up to $400.