if they are not going to be submerged, just paint them. i am assuming the 2x4's will just be supports or holders, and not in the tank (dont put them in the tank).
because it stops the movement of air. same principle as putting your finger over a straw in your drink and pulling it up out of the cup. it'll hold water until you take your finger off the straw. when the valve see's reverse flow, yes the little flapper in it closes.
the trace amounts of copper in your fish food wont kill snails, or shrimp. high doses will harm them, but the trace amounts in food are actually needed for fish, snails, ivertebrates.
wow, that sucks big time. i would bet that air line is where it drained. if in doubt if the line will stay hooked on things, small zip ties can be cinched down over each connection ( think of it as a poor mans hose clamp).
maybe, but many people might hesitate if time runs out, and risk themselves. just my opinion, but it should be something people are prepared for mentally.
not to be mean, but people should always be ready to leave them if absolutely necessary. it would for sure be a last resort, but if things get tight, people come first.
Tijauna street taco's, after consuming ample amounts of beer! 😜of course from what i hear of the last 30yrs, dont go to TJ. no one's life is worth a taco.
they might melt, they might not. what i would probably do is plant them, and see what happens. if they dont melt back, once established you can always trim them. id probably trim 30% of them at a time.
thats a very nice way to go with one. i wind mine up about the same, but no straps, and stuff it on a shelf in my laundry room. the cheap little hook thing is a great idea.