Alk dosing

[Chuckyyy87]

Does anyone use seachem reef fusion2 for just dosing alk? If so how do you do it, also does anyone use it in there auto top off systems?

[seabass]

You can certainly just dose Reef Fusion 2 for alkalinity (without dosing Reef Fusion 1).  It's a mixture of carbonates and bicarbonates, so I don't see any reason that you couldn't add it to your top off water.  Figuring out how much to dose would require more calculations; you'd need to figure out daily consumption, total system water volume, the average amount of water dispensed from your ATO daily...

 

Per their directions: 1 mL per 25 L (6.5 US gallons) contributes 0.176 meq/L of alkalinity

 

Calcium is consumed at a slower rate, but they formulate the solutions so that you would normally dose an equal amount of Reef Fusion 1 and Reef Fusion 2 to replenish typical consumption by corals and coralline algae.