you CAN run a small salt water tank... but it's not always very successful. we have a 12 gallon tank which runs... but unfortunately without the proper lighting... it isn't doing great

it's quite simple to run a salt water tank with all the advancements in technology with them... if you get good equipment that is. it just takes more time if you have critters in it you have to hand feed etc... but it can be simple to run one if you keep to easy to keep stuff... like mushrooms, tube worms etc.

wow emilio... sounds like you have heaps of knowledge... hope to pick your brain when needed!