Rhynchostylis gigantea - chlorosis and dark spots

[Ray]

Originally Posted by vondaix

I have a 2 gallon pump that I put 1/2 tsp of balanced fertilizer in, 1 tsp seaweed, and 1 tsp epsom salt.

That information is of very little value unless you share the formula of the fertilizer and the seaweed, and how often you apply them.

20-20-20 and 1-1-1 are both balanced fertilizers, but 1/4 tsp/gal of the former is about 10 ppm N, which would be sufficient if you applied it daily, while that same amount of the 1-1-1 would be essentially no feeding whatsoever.

How about the seaweed extract?

Do you even need to supplement magnesium? What is your water supply?