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 total cost of corrosion for the storage tanks is $7.0 billion US dollars per year, with an estimation of. $4.5 billion for aboveground storage tanks (AST) and $2.5 billion for underground storage tanks. The total estimated. number of tanks is summarized in Table 1.