Peristaltic dosing pumps are suitable for aquaristic purposes. You can run them for nearly all media used in this field and they are very rigid. You can drive this pump with calcium mixers, calcium reactor, nitrate filters and phosphate filters - all applications with less but constant water flows for a long time.The rigid gear with synchronous motor realizes a long life time - even at continuous operation. The special hose made of Norpren lasts 30 times longer compared to silicone hoses. The pump come from industrial production and stands heavy duty purposes.
The unit pumps constant 50 ml/min = 3 l/h (1,7 fl.oz / min = 0,8 US gal / h). For lower doses you can use a simple timer with a resolution of one minute. For perfect refilling the evaporated water you can use the AquaCare dosing pump with the BasiTech level control.