Squeeze tube on dosingpump

[Kmst80]

So I have got a 5 head aquamedic dosing pump. Originally I only used to dose Alk,Cal and Mag and those 3 pumps only run a few seconds each hour. Been dosing Phyto and Kalkwasser in the other two now for a while and they run over a minute each hour to dose. Problem is the squeeze tube keep breaking, I changed 3 of the dosing pumps in half a year( one twice already). Pumps are shaft driven.
Anyone has the same problem? Is it the cheap squeeze tube? Any other affordable pumps with a different delivery system out there?

 

[exnisstech]

I have a reefdose 2 and have yet to replace the hose after 3 years of use. I have no idea how long it runs each cycle but I've used it for 2 part, AFR and phyto. Sounds like your hose may be poor quality. I had a brs 50 mlm dosing pump that dosed 7 liters of kalk every 24 hours for 6 years with the original hose.