Hello and welcome to the forum.
I read your book around the time lock down started, very good. Used to see your ex at gigs n stuff in London a lot before lockdown. Hard to miss him mind.
Anyway enjoy the forum, Between them they know everything on here, so you’ll not go too far wrong. I though know nothing.
Giant danios are pretty much a secret weapon of mine. I've been stocking my SA tanks for years with giant danios as tankmates. I don't know if you did that on purpose, but a schooling fish like danios or rainbows really helps the cichlids feel more comfortable and will make them much more active.