okay thanks i think the salt i use have calcium and alk not sure how much and i also bought some liquid stuff called purple up before to try and spread that real reef rock thinking it was coraline ****
Hey I was jus re reading this.
How old is your tank again? IME is you put salt water under a light and get some sand live or even dry rock and corals here and there you should have some corraline.
Do you have any ? From the pics I can't tell its green on the screen and I can't see color.
With no corraline and diatoms I'm guessing there's a deeper problem.
I hate to ask but what are you using for top off and mix water.
Even the cheapest salt mix has enough cal alk an mag in it to grow corraline in a small tank not even doing a water change every 2 months.
If you growing softies corraline is the largest consumer of those. Esp if you have a purple tank like mine and dudes crazy purple one above.
Btw in most any tank the purp alge is spread by tiny spores. As the algae grows and spreads it sends off little bits into the water and finds areas of light it likes and flow it live under. It Auto seeds. If we sent you corraline you crush it or just drop it in your tank and it goes. I used Fiji Mud on my current build and I got colors of corraline I've never had before. It's mud just swish it around and it grows. Same in the cube I just did. 3 weeks later boom.
Purp coral line hate 450 to 420 led's. But still.
So I think there's something else goin on here.