Technically, industrial metering pumps aren't peristaltic pumps like the masterflex in the picture. Instead, they're positive-displacement piston pumps. Part of the reason for this is that peristaltic pumps have the inherent problem of plastic tubing fatigue and changes to the amount metered into the process. Another reason is that a true piston-type metering pump is capable of working against high pressures, which is advantageous in the chemical process industry.
The reason that you typically don't see these types of pumps used as dosing pumps in reef tank applications is that they are generally quite loud.
If you're looking for alternatives in the way of the typical peristaltic dosing pump that has a higher build quality, a few suggestions would be the GHL dosing pumps and the Neptune D.O.S. system pumps. Both have some inherent safeties to prevent over-dosing. A tried and true, very high quality peristaltic dosing system that's been around for years and years is litermeter, they're pretty much bullet proof. However, none of these pumps are intended for continuous operation, such as one would want for a calcium reactor (enter Masterflex pumps, which are designed for this purpose).
