It's always 50/50 with any clown fish.....Some go in 5 minutes after putting in tank, weeks, months and sometimes never.....In generally though I have seen tomatoes hosting nems
bta is a natural host of tomato so it WILL. it's just a matter of time. IMO for those less powerful specimens, they're less picky and more eager to dive into an anemone but for more powerful ones like tomato, they take a lil bit longer time
But if the anemone is its natural host, the nemo will dive in--sooner or later