[e46er]

Tank looks great! Ponds are awesome!
In regards to your dosing thoughts- you have a very small coral load which means small uptake of cal/alk so water changes will handle it for the most part.
When you tank has a bigger coral load either with more coral or size of corals your demand for cal/alk will go up far past the point of just water changes.

My tank uses about 30 ppm cal daily so instead of having it drop 210 ppm and dosing weekly I dose daily with a doser well every 2 hrs actually stability is key.