I currently have a 10 and a 6.5 (both are over 3 years old) would say that something along the lines of a YWMG would be a good choice I have 2 little ocellaris clown fish in mine and while he uses the whole tank (Which is not hard for any fish in a nano) they seem to do fine I also have a purple pseudochromis that calls my tank home he was the last fish added as they can be agressive and can not be housed with fire fish or WYMG fish or fish with the same genral body structure /shape they can also pick on shrimp so be sure if you add one that your shrimp is in good size keeping them well fed(the first few weeks will help then you can taper back to the normal feeding (which for me is 2xs a week)) ... As with any system with fish you will want to consider a lid of egg crate or some other type of cover that allows it to be "open" yet closed off from jumpers(since all fish have the ability to jump (I know you know this but some one who is researching may not
)) ..I also would say that if you were to add corals in you could go with 7 -8LBS of LR
as you will make up the rest as you add corals ..
In our tank that we have left it is the 2 ocellaris clowns misbared for looks, 1 purple pseudochromis , and the shrimp .. the clowns were added 2 days apart 3-4 years ago.Our fish are all about 3-4 years old , we feed them 2Xs a week and do a 2 gallon water change with RO
water that we draw up weekly .. We had intitally 6lbs LR
and added corals so we quickly made up the other 4 lbs and currently have close to 14LBS LR
in our tank .All equipment are maintained by reefkeeper . We are running 80 watts pc
with a 50/50 and actinic light on at 11 am and noon respectively and off at 7 and 8 respectivly ..I run a penguin 150 filter with a 50 watt titanium heater that is stashed in the filter box to hide it .. The heater is at 77* with a 1* varience .2 power heads that are on 24/7 so they are pluged into a UPS system ..