Yep. Im trying to get as many opinions as I can before I start construction. Minimum I will build is 4x10x2. If I can have a variety of fish living happily together for 15 years or more in my pond I will be very happy. I have seen territorial aggression first hand with maroon clowns, yellow watchmans and 2 pistol shrimp I tried to pair up. Lost one animal in each case very quickly. I love my blue spot. I wouldnt want to see him shredded in a fight with another grouper. Nor would I want to spend 50 bucks to watch him kill a minatus. But I do have a successful tank with a condy anemone, a tomato clown, a snowflake moray and a very smart mollie. No problems what so ever. The eel comes out the tomato stays protected in his nem, the snowflake knows the nem hurts, perfect situation. The only regret with that tank is I had a power outtage on a really hot day and lost my male clownfish and a cleaner shrimp that the snowflake accepted. He used to open his mouth and let the shrimp clean him. I love this hobby.