Too much Gaia Green power bloom

I think even if you covered the entire surface of the pot with power bloom you would still be okay. You most likely just over-watered a little or maybe peeped at the plants right before bedtime. If the leaves and branches at pointing nearly straight down they are very dehydrated and on the verge of dying. I wouldn't vacuum your valuable amendments. Maybe add a little medium to it so its doesn't clump up and make it hard to water.

You can't top dress with too much Gaia green power bloom. I grew an autoflower in nothing but power bloom and some pebbles for aeration. I collected the runoff in a catch basin. Recycled the runoff the entire grow. Plant was super healthy with dense tight buds.

I wouldn't suggest you'll need to replace the soil. I'm quite a novice but perhaps all you'll need is to flush with PH appropriate water once you've vaccuumed the excess from the top soil. If you haven't culitvated the soil that'll also make it easier to remove the ammendment. It'll be okay, but I think replacing the soil might do more damage to the roots than to allow the toxicity to wash out. Interested to see what the other members of the community think, as again - I have much less experience than some of the growers here. Lastly, it might help to give more information about your medium, pot size, strain, photoperiod v autoflower etc. so a more tailored anser will be generated. Good luck and happy growing!