After making over half a tonne of beer in the last six months using four fermenters, over two hundred PET bottles, tubes, spoons etc I have not used anything other than:
Woolies plain bleach mixed at the rate of about one to ten of water from the HWS which is solar, and around here it gets so hot it would literally take your skin off:
Napisan if removing a yeast ring at the inside of the bottle.
Ample usage of the above hot water for rinsing etc
Religious rinsing of PET bottles after pouring and before supping.
Never lost a brew or had a crook bottle.
I bought a tub of the old Sodium Met in June when I started off, it's still unopened in my brew cupboard.
Fermenters: wash with hot water twice. Add dishwashing detergent like Tandil or Blast and wash it as if it's a huge coffee cup, using a soft dishwash cloth. Rinse three times with the super hot water. Add the bleach mixture and leave for at least overnight. Rinse with cold tap water three times. Scour with the super hot water before filling.
There's usually so much grunting and shaking going on in the laundry the Mrs comes out to see if I've got a sheep in there :lol:
If there's anything left alive in my fermenters before filling I'll walk to Bourke.
Bottles: Mix up three litres of solution of the bleach, fill bottles about one sixth, shake and cap and walk away for half an hour. Rinse three times with tap water and once with fairly hot water (the superhot will melt them). Bottle
If there's any hint of a ring at the top of the bottle, I fill with napisan solution and leave for a few days. Napisan will eat just about anything.