Reef Pro Mix (RPM) Part 2 Calcium Buffer System
It is impossible to maintain a healthy, vibrant marine aquarium without also maintaining the proper levels of calcium and alkalinity. Fritz RPM Calcium Buffer System allows aquarists to maintain these two critical components in their proper ionic balance. Unlike other similar products, Fritz Calcium Buffer System does not contain unmeasured and unnecessary ions and metals, which unchecked can lead to toxicity in the aquarium. Part 2 is formulated to provide the highest purity calcium, and when used in conjunction with Part 1, along with regular water changes with a high quality salt, will provide the correct ionic balance necessary for healthy and beautiful coral, fish and invertebrates.
| Guaranteed Analysis | Value |
|---|---|
| Calcium (min) | 55,000 ppm |
FAQ
What is the recommended way to use Part 2 with Part 1?
Part 2 should be used in conjunction with Part 1 to maintain proper ionic balance. Regular water changes with high-quality salt are also recommended for optimal results.
Does this product contain any harmful metals or ions?
No, Fritz RPM Calcium Buffer System does not contain unmeasured or unnecessary ions and metals that could lead to toxicity.
Can this product be used in a reef tank with live corals?
Yes, when used with Part 1 and regular water changes, it supports healthy coral growth by maintaining proper calcium and alkalinity levels.

Liam Buckland –
I’ve been using the RPM Part 2 with Part 1 for three months now. My corals have grown more vibrant and the water parameters are stable. No signs of toxicity or imbalance. Highly recommend for reef keepers who want reliable calcium support.
Karen Hunter –
The calcium levels have stayed consistent since I started using this product. It works well with my existing salt mix. I still do weekly water changes, but the system feels more stable now.
Oliver Glover –
After switching from a generic calcium supplement, I noticed a clear improvement in my soft corals. The water chemistry remains balanced, and I haven’t had any issues with pH or alkalinity fluctuations.