I have a 20 hex that has been up and running for 6 months. Never lost a fish yet.
My equiptment is a whisper 1 or a second nature 1 hang on filter from the tank when it was fresh, I had two filters both were broke so I put them together to make 1 so i don't know what it really is. It has a single 18000k reg flo light. It also has avery cheap heater. That is all it has for equiptment.
As far as what is in the tank is not much but it looks very nice its agreat conversation piece,
4 inches of cc and two 4 stripes and 1 blue damselfish. They have been in there for close to six months. Up until this weekend it had no lr. but now it has close to 20lbs.
The fish and the lr are from my 38 that i am in the process of reconfiguring. which has been up and running fro over a year.
I do water changes religiously once a week, about 5 gallons in each tank.
If i miss one day in a water change the ph goes to hell, nothing else really has gone bad yet(water parameters).
How ever they are only Damsels and I do feed very small amounts.
I use the tank as a qt for now. I plan on a light upgrade and adding some hearty corals and hope that all goes well.
I suggest it if you do not have alot of money and if you have the time.
A lot of people told me it would not work,so i tried. And is all well.
Good Luck
And Go For It
VAZ