Aquarium 105×40x52 (200l capacity, 170l of water) DIY. Lighting 4×39W T5 6500K DIY. Eheim External Filter 2224 w/ Installation Set A + B, 700l/h and 3l of filter medium. Eheim-Jager 100W Heater. 19l ADA AquaSoil Amazonica. CO2 bio injection DIY w/ JBL Permanent Test
Do it slowly...
Poecilia Reticulata, Guppy; Xiphophorus Maculatus, Platy; Paracheirodon Inessi, Tetra Neon; Hasemania Nana, Tetra Silver Tip.; Ancistrus sp.; Otocinclus affinis; Corydoras Paleatus, Aenus and Panda; Crossocheilus Siamensis, SAE; Neocaridina Denticulata Sinensis, Red-Cherry Shrimp.
Glossostigma Elatinoides; Valisneria Spiralis; Hygrophila Polysperma; Vesicularia Dubyana; Echinodorus (unknown); Nesaea Crassicaulis; Rotala Boshi-Nanjenshan; Didiples Diandra; others...
There is no spoon.
When you see signs of stress in your fish, you can then take steps to identify the source of that stress and then to resolve it before it becomes a major issue.
If you're looking for a unique way to stock your new tank, give freshwater shrimp a try.
If your fish is suffering, you may want to consider euthanasia as an option to humanely end his pain.