I am somewhat certain I've seen some recommendations for plastic clips/clamps that help keep air from getting into dosing pump lines on this site, but several searches have left me empty handed.
I'm running a Hygger 4 peristaltic pump doser. I am using a 3-compartment acrylic fert...
I see some DIY peristaltic pump threads and think
DEER GEEZUS! you all spend alotta money:icon_eek:
go the cheap route..I did
Pump Head w/ motor ($20)
12v 1a power supply ($5)
Digital Timer ($10)
There aren't that many examples of peristaltic pump dosing, so here's how I set mine up.
Here you see some emptied out peroxide bottles, holes drilled in the caps for the dosing line. The inside is standard LDPE RO line, connected to a "hose connector" which bridges onto the Tygon lab...