I would pull the oyster shells and not use vit. C
UPDATE:
Well, here it is guys. Everything went great with the little 32G grow out, now it’s on to the 75G. Nearly cycled in 6 days…ammonia 0, nitrite .5, nitrates 10. Sump is filled with bioballs and ceramic media. Discus growing at a great rate.ED56C1D0-73E0-4221-8B5F-423E44F4CEC3.jpeg
You are doing great!!!
Very nice! Post some more pics as they grow.