Netting (quick) fish in established (planted) systems

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Thanks all.
To clarify, when I wrote this follow-up note "tear-down" was related to removing the five high-speed lemon tetras who share the space. However, these fish simply don't grub the bottom nor structure at all, they only take what's swimming, or falling in the case of food-bits. Once it's still or on-bottom they ignore. Baby shrimp would be realtively safe so long as they don't swim midwater, and the tetra's mouth is tiny so a well fed baby shrimp should soon outgrow.
I've also since found three, maybe four of the original 6x adult shrimp (still) in the tank, at least one of whom currently has eggs visible internally. They don't seem to be growing, though there's plenty of leaf-litter/leaves provided. Literature suggests up-to 2", but these guys still are less-than 2cm & I rarely see shed.

So, now, on further inspection & thought, "tear-down" would include seed-shrimp/ostracods, which have always been plentiful in most of my systems (particularly this one as tetras won't eat) and I expect are culprit to the shrimp-issue as either food-competitor or baby-predator, or both. There's a scud or two in there also, though they're also not thriving. Ostracods may also be responsible for my lack of tetra spawning.

So I'm tending to (want to?) blame the ostracods. This would be a) a relocate all fish & shrimp, tear-down & dry, scrub & re-set to get on-top of these wee... issues, or b) adding baby (~1cm) paradise fish who seem to have near-eradicated ostracods (etc) their own grow-out tank. a) would be risky-bad for adult shrimp in the immediate term, b) would be bad for any baby-shrimp in the short/mid-term, though bigger parents may help longer-term & I can still remove the paradise later as they're slower/sleepier than the tetras. I likely still would be wise to get the tetras out...
 
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A 2-inch cherry shrimp? After selling/trading/gifting many hundreds of shrimp...and using many more as feeders...I have never, ever seen a cherry shrimp more than an inch long. Maybe the internet suggests 2-inches, but...well, I read a lot of unbelievable stuff on the internet. I've never seen a red cherry exceeding an inch in length.

My money is still on the tetras as your shrimp-eaters. Why don't you try dropping the temperature in the tank down to 70-ish degrees; the tetras will be less active and easier to catch. A day or two at that temp, or even a touch lower, won't cause them any permanent harm, and the shrimp will likely prefer the slightly cooler tank.
 
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