kalk is the way to go before dosing 2 part helps keep ph up puts in cal and alk in equal parts and help precip phosphate. and kamoer has been good to me so far all high end doser are a waste of money had a ghl old school one and the screen burned out and the new deltec ones are a rebranded kamoer.
I think these are what he is asking for isolation box can be put in the tank
https://www.aliexpress.com/item-img/Acrylic-Fish-Tank-Isolation-Box-Fish-Breeding-boxes/32799247688.html?spm=2114.10010108.1000017.2.ARp9SY