Hope this works
The bottle on the left is warming, number 2 is BBS that is say 12 hours old, number 3 is 24 hours old and number 4 is about to be used as it is about 36 hours old.
I syphon the BBS through the pillow slip and catch the water in a jug as it drips through
Feed the BBS to the fry (and some adults) then put 80 to 90% of the water back in the bottle to rewarm before adding more eggs 12 hours later and starting again
The hardest thing is remembering which bottle is next. It is honestly a problem sometimes. To solve this I have the bottles numbered (on the outside of the tanks) from 1 to 3 and I put a peg on the one that is to be used next. That way you always move from left to right and replace the bottle your using with the bottle thats warming. The proble with not numbering is that I use to sometimes use say the one on the right at night and the 2nd right in the morning instead of going back to the start,.
Note the way that a airhose goes in the top and down to the base of the bottle then another air hose starts at the top of the same bottle and goes to the bottom of the second and so on
In reading this, I would swear that I have had a few too many tonight but I havnt had a drop
If I can answer any questions Im happy to