Hi y'all question about whats next

[mandi29221]

Tank is a 75g/40breeder sump. Its 2.8 months old. So for 2 years i had a major issue with green hair algae. Well now i have nitrates and phosphates at zero finally. Now i have stringy red spider web looking crap and i wanna know how to get rid of it. Not dinos had that. No bubbles in the stringy crap. I got new corals and i have to keep blowing off the corals like 8x a day. My parameters look so much better. 0 ammonia 0 nitrites 0 nitrates 490 calcium 1480 magnesium 10.4 KH salinity is 1.025 temp is 78.6. I just wanna keep corals alive now. Just need next step... also i get like blue green sand clumps too. Stock life foxface one spot, 2 yellow tailed damsels, lemonpeel, maroon clown, flameback tang, leopard wrasse, green spotted puffer(great citizen) and a blue spot blenny. I think i covered everything. Any other questions let me know

 

[Jason mack]

My guess it's either cyno or dinos ...raise no3 5-10ppm and po4 0.05 - 0.1
No3 and po4 should never be allowed too 0 out ...you will starve your corals and open your self up for dinos of cyno taking over ...
If you can get a sample under microscope...it would be helpful

 

[GabeM]

Looks like cyano. I dose hydrogen peroxide daily to keep it out. Nutrients should be not 0 but not excessive like @Jason mack said.

 

[Jason mack]

If it were cyno I'd expect too see more on the sand bed ...which makes me lean towards dinos...you can do a simple test ...catch some in a cup with a little tank water ...mix it up till it breaks up ..then leave on the sun for a while ..if it clumps back together...its dinos if not cyno