UPDATE

One doubled in size and the other is slowly coming along. BUT the problem is spreading

I havnt touched miracle grow in weeks so it has to be overwattering or heat issues.

50% of the larger female is black spots leafs and new growth on top is looking superb. The other plant is yellow as hell with the same new growth at the top excellent.

Im going to leave my fan on 20/7 and stop watering for 5 days. pictures say a thousand words but pictures are imcriminating.