well - at first: sorry 'bout my poor english, I'm from Germany and not a native speaker =)
I'm quite new to bonsai - so I started to read a lot before I decided to buy a Callistemon. I decided to buy this one because I'll keep it indoors an I got a lot of sun there - which most plants don't like

Two weeks ago, the callistemon arrived and it looked fine - except the roots sticked out of the bottom of the bowl (you'll see it in one of the attached pictures)
Well - as i knew from reading, the callistemon need good watering and must'nt get dry. So I checked the moisture twice a day and wtered it by spraying the leaves and waterign the soil. Last monday i putted the bonsai into a waterbath - with bonsai-fertilizer. The soil was moist 'bout till wednesday.
The fact is - the callistemon started to loose leaves - the got yellow and dry and just fell off. And I'm not talking about 3 or 5 ... it's bout 20-30 a day... And even the new sprouts got brown tips.
So - well - does anyone what I can do?
Too much watering? to Less watering? Not enough light?(Cn't change that :/ )