It will be grown indoors when fall /winter is incoming, so the akadama should be sufficient. I reached out to couple other sources mirai bonsai has several posts on the akadama seems they use all akadama on thiers but with the above recommended lava or pumice added it should be drier no? I can always ammendment it with other things to ensure drier conditions but what I've read is they love alot water when actively growing yet much drier (7 to 10 days between ) or just 1 inch down dryness before next watering when semidormant or dormant . Given my weather is way below recommended cold tolerance I will be growing indoors over the foldest parts of year and on germination mat as itll keep the ambient temps and roots warmer. Ive read if kept above 60°to 80°f it will remain semi dormant and if above 80°f won't go dormant at all possibly. Long as let go dormant once while it'll remain healthy or so I've read . I've seen people claim they have over sintered once dormant inside refrigerators where its kept above freezing but below 40f° which is basically where mine is set for seeds in cold stratification. So alot variables but also possibilities (maybe ) still alot to learn ofc . And maybe I'm misinformed so not saying what I've read or been told elsewhere is correct hence hoping many more people might respond

tbh several views but only 2 responded so wondering if I'm over typing or not being clear enough or maybe I'm hyper for responses and being off-putting idk . Hoping figure out and learn more