Hello there, ive been into aquariums for quite a long time now but have never ventured to the brackish side so i could use all the help i can get. At the moment i have a 280litre tank(freshwater) that i was hoping to convert to brackish gradually by replacing 1/3of the water with seawater. I was cycling this tank with 5fancy guppies when i got a 'freshwater' moray eel last week, i havent seen the eel eat anything all week and he doesnt bother even chasing the guppies yet every cube of bloodworms i throw in dissapears, just not sure if its him or the guppies cos he doesnt even react to food when im looking. Anyways i was wonder what could i keep in this tank(230ltr is 50gal i think). I was thinking of maybe a ngt dat but im not sure how much they cost :/ What about a school of monos and 2 scats or would that be too much?