No, they are made for small tanks and the flow spread is not really going to be effective on anything over 4ft long. A 6025 is good for the 10-29 range. A 6045 for the 30-58 sizes, maybe 75 with a couple of units. The 6055 is going to be best for anything under 120gals. They just aren't for big tanks, the existing Streams will still be available for the larger tanks.