which is better?

[ZooShark1029]

Purple up or the 2 part calcium A and B?
thanks

 

[loyalrogue]

Two part since you can actually test for what you're dosing.

 

[ReefWreak]

purpleup has always been regarded as nothing but a joke and/or gimmick in this hobby, at least by the chemistry nerds who know a thing or to about aquarium chemistry. If you don't feel that your tank needs full blown 2 part, then kalkwasser or pickling lime is an inexpensive alternative to keeping your tank at a relatively stable level, while being able to add calcium and alkalinity in a balanced set.

 

[illal]

i use b-ionic

 

[macawmagic]

you've seen my tank. kalkwasser can deff keep up with the calcium and alk needs of a tank. that's all I do and everything is growing happily!

but on your question...I would say b-ionic over purple up anyday!

 

[ZURCSREEF]

b-ionic is the best for manual dosing imho