@luv2grow @calicat There's a product by Optic Foliar called switch. Doesn't exactly work like Dutch Master Reverse did, but it's more of an "in case you think your plants are going to herm," product. It's a RTU, says you have to use it with Optic Foliar Transport (10ml/liter 2tsp/quart) spray day 7 & 17 of bloom cycle or the first sign of flower stress. It's a 0-0.02-2 (Phosphate P2O5 0.02%, Soluble POtash K2O 2.0%).
I've used it before, marginal burning issue though :/. Transport is suppose to make it able to spray when your lights are on, I've used transport before to do this with almost no burning at all (one time I forgot to cut the nutes by 1/2 when using transport which led to burning).