Versa Pumps losing calibration

[elwallacejr]

I have been trying to use Versa dosing pumps for various solutions for the last 2 years. I have tried the following:

1. Continuous CaRx Feed pump
2. Continuous Dosing for All-for-reef
3. ATO pump (essentially shutting it on and off to top off based on Neptune Apex probes)
4. Continuous Kalkwasser feed pump

In all but scenario 3, I have noticed that the amount of actual product being dosed degrades over time; time being 1 month. For the latest Kalkwasser feed scenario, I have it set to dose 2.5l a day but I'd have to guess I'm getting 1l a day. The source water has about 8' of head with the pump at the sump level for the KW solution (but same level for the CaRx solution). All-4-reef solution is in the same cabinet, but again slowly drops in product delivered. I have replaced the peri tubes on the pumps.

From what I'm seeing these pumps just can't keep a calibration at all. I'd love to hear from other folks. I just can't believe that a product like this (and from its manufacturer) could be so fickle but I'm about at a loss.

So in the end, does this sound familiar to anyone?

Thanks in advance!

 

[TheSheff]

I have also had issues with the versa. First, my push connect fittings leaked, now its lost calibration as well. These dosers are not worth the money. I bought a cheaper kamoer pump on amazon and its much better.