We know how it is, having a 5,300 gallon aquarium and not sure how to extract all those proteins from your aquarium. You could however get Royal Exclusiv to custom make you a Bubble King 650 skimmer which is exactly what a customer in Hong Kong did.Â Well how exactly do you skim so much water? With Dragon power of course! There are 3 x 2000 Red Dragon Skimmer Pumps (6000 lph total air) that power this beast which allows you to run up to a 20,000 litter aquarium, which equates to about 5,300 gallons. We’re not sure how much this beast cost, and honestly we are afraid to ask.