How long after hydro nutrient switch until flowers stop dropping?

I have 12 indoor plants. All are about 3-4 months old and at least 1' and some change tall. I have a 400W HPS hanging about a foot over the canopy level. All are aerated as well with 70L/min split between them evenly through a 12 port manifold. For the last 3 months they have been in Sensi Grow Perfect pH A+B "Grow" to about 800 or 900 ppm with nutrient/full water changes every two weeks ish and were topped several times and pruned ever so often so they are fairly bushy. About three weeks ago I stopped pinching buds and just let flowers grow out and a week and a half ago switched Sensi Grow "Bloom" Perfect pH A+B @ 800-900 ppm, cycling light at 12/12, and have been shaking the plants every day. Still getting dropped flowers. When to worry and should I be doing anything else? They have two fans blowing on them.

I know an hps can heat up a room pretty easily. What are your temps when your light is running?

About 70F. The A/C manages to keep up pretty well.

Unless you have medicinal plants in your grow room that are strictly used for your gloucoma you'd be better off running an 18/6 light schedule.

Neil

I do not. These are all hot peppers. I had just read something about a 12/12 cycle even for hot peppers.