Last time I checked bulk is the same price per litre and cans are the same price, but 1+44 is in 5litre cans rather than 6 litre cans.
Since we would us the same number of cans, the saving would be solely on bulk acid. Across 5 units I calculated a yearly saving of ~ £9000.
The work, logistics and hassle involved in changing over the 5 units however is considerable and I have been putting it off.
Don't knock it, on a unit doing 20 treatments AM and the same PM using 4L per treatment that equates to a whopping £50 over the course of a year, savings of this magnitude are not to be sniffed at!!!!!
Cost of a can of 1+44 or 1+34 is the same if I recall. Each treatment uses a can so no savings unless you are on central acid where the price per litre is the same so this is where the savings can be made.