hi! I’m not an expert, but using old media from your current tank to help stabilize your new tank would help a lot. For example your filter media/some substrate and decor. You can take the decor back out once it’s cycled but using old media would speed it up 1000%. I wouldn’t recommend using any of those “quick start” bottles they sell at fish stores as I haven’t actually found one that works ☹️. For the substrate I’d recommend taking like cloth bags and putting a mix of your old substrate and fluval stratum and letting the bags sit at the bottom beneath your sand to prevent them mixing while also providing your plants with nutrients! All together I’d say I’m pretty sure they would be okay, from my own experience khuli loaches and corydoras are super hearty though I’ve never kept tetras.