Which NLS or Northfin food would you recommend specifically?
I am using NLS ultra red. NLS cichlid is also a good food. Northfin cichlid is good.
I think Northfin tropical pallets (first 2 ingredients are fish meals) has slightly lesser amount of krill than cichlid (which has 1st ingredient as krill) so may be you can mix it with Northfin krill. It would be better to get

For algae based pallet as supplement I would go with NLS Algaemax which has 9 types of algae vs northfin vaggie pallet which mostly consists of kelp.
I am assuming the ingredients are order by quantity they are used as human food.