Ok, let's see if I understand your QT setup and method.
10 or 20 long paint underside of bottom with waterbased???paint (not sure if latex will stick to glass).
Make structure out of PVC pipe and place inside QT.
Do not add LR or LS to QT as it is not used.
Apply background paper to back and maybe sides of QT if desired
Heater, ammonia sensor and powerhead
Only use water from Main Tank sump to initially fill QT and for water changes thereafter.
Similar type lighting used in Main Tank????? (sounds expensive)
Hang on Top??? I'm assuming you are talking about a hang on back type filter like the Eheim Liberty 100 hang on filter?
I have no idea about the sponge filter, where does it go?
Setup QT tank a week or so prior to adding coral or fish to Main Tank.
Water changes every other day using sump water from Main Tank.
Test/monitor water quality (ammonia, nitrates, nitrites) every day (before or after water change?)
Leave coral in QT for at least 2 weeks/fish 4 weeks AFTER all is well.
If you have a pic handy of your QT that would be awesome.
Sorry this got off subject of clownfish, I'm still confused about determining the --- of the clownfish and how to choose one by size of what's in the store display tank. What about ordering online?
Regarding the Majestic Angel, I chose this because of beauty and it's adult size is smaller than most angelfish. Trying to get by with my 75G, ya know? Do you have any suggestions of another large sized multi-color eye stopping "Queen of the tank" type fish?
Of course you have been very helpful.