Ah, gotcha, so the 0.9g added where needles. Interesting.

To re-crash 0.9g you need ~430mg of citric, and you are below that. I think you need to increase the  scaled citric acid by the amount needed to take care of the added needles:

250mg (scaled TEK)+ 430mg (added needles) ~ 680mg (total needed)

Since you added 300mg of citric I would check the pH if not done so already. It may not be acidic yet. Then I would add ~380mg more of citric acid and see if it clouds up and more needles form.