Which Dosing unit to buy?

[shrimpchips]

Originally Posted by daniella3d

And if a pump ever break, it is cheap to replace. What's the risk? so if a pump stop working, the calcium or the alkalinity will get lower...so what? this cannot screw up a tank anyway. before I was using the dosing pump my alkalinity sometimes went down to 5 and none of my coral were affected, including the sps. I had alkalinité and calcium swings.

You probably didn't have an SPS heavy tank then. If the Ca stops for a day or two in my tank, it drops like a rock. Just last week I ran out of Ca buffer for what couldn't be more than 2-3 days. In a 120g system, my Ca went from 400 to 160. It's a pretty big deal. Stability is key and the whole point of a Doser.

In the end, like most everything, you get what you pay for.