I think you are politely conveying a mild concern
- not really - i know there are multiple tanks & you recognise the needs
of the fishes which is key - plus you cater for them!
'Immense' as in 'big'
My personal preference is to keep species in groups where possible as the best & typical behaviours are seen but each to their own.
Some people like to keep for example one
of each pleco they find - this is ok in itself as long as the fish needs are met & sometimes this becomes an issue when you keep veggie eaters with meat eaters or species that need high & low temps together. If these problems are known about & catered for then all is well