IM 25G Lagoon Tank Build

[Frogger]

Bubble algae is a tough one. Some say Vibrant helps more say it doesn't. Manual removal is the most reliable, although this will be a never ending battle.

I once had a Sally Lightfoot Crab eat them like crazy (many many years ago).

Confirm your calcium readings with a completely different (brand) test kit. Have you tested the newly mixed salt? I know Reef Crystal can sometimes mix high but not in the 600 range.