Hi all,
cheers Darrel
The difference is absolutely <"chalk and cheese">. I really feel sorry for small fish in iwagumis etc. and I still think about @Dr Mike Oxgreen's <"innovative approach"> in <"What's wrong with my chili rasboras?">.I always found it interesting that when I had a lot of floating plants me ember tetras change behaviour. Much of the threat fish perceive seems top be from above.
........ But I now think the real key is surface cover. It seems that chillies don't like open surface. The challenge for me now is to find a way of pruning the hornwort so that it provides fairly thick surface cover but doesn't block your view into the tank..........
cheers Darrel