Well no not fish tank tubing, lol, but home appliance tubing. Still clear and they usually have a good selection of ID/OD and different flex types. Like this...http://www.homedepot.ca/wcsstore/HomeDepotCanada/images/catalog/21439.SVLI_4.jpg that whole roll is probably $10usd. IMO that Special tubing is all marketing and doesn't do anything more/less then the standard stuff. When I built my external Pump/Rad box 2-3 years ago I used tubing from Lowes, and it is still in great shape today.