$25 for a 20lb tank is a good deal, co2 in a tent can be complicated they aren't air tight and without exhaust you get heat and humidity building up real quick
Green painter's tape, strong enough to temporarily hold things in place but doesn't leave residue when you take it off.
Paracord and hemp twine
Needle nose shears
Congrats on the twins. I just had the same thing a couple days ago 1 seed 2 sprouts but I gently separated and repotted them so far they're both doing fine.
Probably too cold and dry like you thought. I always drop seeds in straight coco with a mild nutrient solution, put them on a seed mat and have a high success rate.
Last time I used wire shelves on a 4x4 flood table and pumped out the waste water when it got too high. Used a cheap Nearpow digital timer for the feed pump to come on a few minutes 3-4 times a day using a simple drip ring with 1/4 line and 4 t-barbs to dry and disperse it a bit.
A bagseed from a couple years ago, still working through old tubs of 5-12-26 and calcium nitrate. I'll never use liquid nutes again. This time I'm gonna try the 12-4-16 during veg, I like to use hydrobuddy to dial it in.
Thanks, it's not gonna be the biggest yield so I haven't sampled anything yet but definitely looking forward to it. It's my first grow after a long hiatus, room for improvement next run. :bigjoint: