When it rains, it pours Sorry to hear about the troubles, hope things get better here on out.

Start LST once they have a few nodes, maybe 4 or 5. Repot when needed. Just slide off the pot and check the roots. It's time to transplant if: the roots are growing out of the drainage holes, have circled the bottom edge a couple times, or the plant is growing slowly and drinking water fast.

I think with the carbon filter it's going to be a DIY thing for you. A pre-fabricated filter and fan combination (where the CFMs are matched) would be the best, but maybe too pricey. The filter depends on the fan you have. Computer fans are good but have trouble pulling through carbon filters. Maybe a bathroom exhaust fan from Home Depot? I have no experience with that gel you posted, but the online consensus for odor control is typically activated carbon.

Hope that helps. Keep reading and taking in new ideas from others, it'll all work out eventually. :jointsmile: