I am fairly new to the SWT game just to throw that out there. I have had my tank up n running for a week now just being paient and waiting for the cycling process to complete (which i have been told is about another week before i throw my "breaking in the tank fish") i have a FOWLR tank and my live rock have been in there for the same time as the tank has been running. I dont know the exact make of my filter but it is a very good filtration system. All in one its a Sump Refume type filter with a protein skimmer, canistoer, and wet& Dry hanging from the tank it filters 500 gallons an hour and has a side 3 gallon tank which we have filled with fresh conditioned water that automatically gets pumped into the tank when the water level drops which is very nice so theres no mess is changing the water every week. Now that you have a slight idea of what I'm working with this is whats going on and what i have in mind for when my tank is ready to accpet some new friends. But before we get to my idea i have encounted a slight change on the road. I have a friend whos a manager at a Local petland discounts store but he is good with salt water tanks and has two at home one saltwater fish only and one fresh water tank I have been retaing info from him (as well as whatever i can get online that makes sense to me) but everything he has told me has been a success he also stressed that the key was filtration which is why i spent so much on my filter system (grand total of $520) do u guys think it was worth it?.... But while on one of my daily visits to see him to accuire some info. i spotted a green spotted puffer fish(fresh/saltwater. My son has a tank in his room (fresh water gold fish only) i thought of getting him one (how cool right) turns out i couldnt gold fish are to dirty and the puffer would eat them anyway. He did tell me i could throw the puffers into my tank even though my tank was only running for 4 days at the time i was nervous but he said they would be fine and that they would be nice starter fish instead of the demsals they were only 5 bucks soo i agreed (KNOWING THERE WAS A BIG CHANCE THEY WOULNDT SURVIVE SMH) he assured me it would be fine n that they were fresh water but really thrived in salt water soo i got two and they are doing great together they only have 3 days in the tank but they been eating well swimming well and they have lots and lots of personailty love to see what goes on outside the tank but are on the semi-agressive end. I research they get about 5 to 6 inches. I really wanted a more agressive tank that consisted of a Dwarf lionfish humu humu trigger possibly a snow flake eel as my main fish i had the thought of adding a valetini puffer since they dont get to big but thats not longer an opition, i now have thess two green spotted puffers do you think all this will work?...(n i do understand that the trigger is going to need more space as he grows i do have a 90 gallon tank just without the stand which is why i went with my 55 cause i had the stand soo i would upgrade once the humu strats to grow).....I have really taken a liking to the puffers soo i would like to keep them in there!! ALSO, any suggestions on what i can buy as a filter feeder something to clean the tank up a bite...I ask because the green spotted puffers eat everything its crazy from snails to cray fish to shirmp i dont know what to throw in there!!