I change 15 gallons every 10 days. The tank is about 8 years old but at the begging of January I moved it from jersey three hours away. I brought all the water and live rock and sand back with it I run my blues from 13:00-22:00 and whites from 14:00-21:00. I feed frozen mysis shrimp every other day and pellets on the opposite days. Here is my stock list
Mixed pair of clowns
Orange dot goby
Six line wrasse
Neon dottyback
Orange eye sea urchin
Large serpent star
5 turbo snails
12 blue leg hermits
12 red leg hermits
3 emerald crabs
The tank is a 92gal corner with a 20 gal sump. (13 actual gallons of water). 2 150w mh 10,000k and 2 460nm t5's