I am new to reef tanks. I have a saltwater 55 gallon tank with a full filtration system that goes under the sand bed and provides water movement through the powerheads. Then I have 2 hang off the back filters. Just normal filters that u would see on a freshwater tank. Now lately ive been seeing how cool reefs tanks are so im trying to see how i can convert my tank to reef ready. I have no idea were to start though. Like do i need a sump? or a wet/dry filter? what about a protein skimmer? do i get a hangoff the back or what? Please just give me a list of everything i need but im on a type budget so please just try to keep it at a descent price. Thanks