Hi cvs04 ..

I started with small tubs, similar in size to the 1/2 barrels....thinking I would save some money.

It seemed like less at first....but then I had to buy and install all the 'extra' fittings on 'each' bed and build bell siphons for 'each'. Plus, it took (extra) time to install all the fittings.

The 'fittings cost' started to add fast...needed a ball valve ($) for 'each bed' to help control the bell...plus, each bell 'could' act up at any time. They work pretty well 'usually'....just expanding the chance of a failure with more of them.

It's a big decision....wish you the best...