Cal/Mag/Alk Where to start?

[Aquattro]

Originally Posted by Magma

Each SPS frag is probably 4-5" and I have 3 different Frog spawns growing now

Still probably ok with water changes. Best way though is to measure your consumption between water changes. Then you know exactly what/if you need to supplement. One you know if, you'll know how much and then better be able to determine the best "how".