C500
Two Trays 
Based on actual feedback for C1000 and overall dimensions we estimate the one tray available for biological media will hold approximately 60 cu in.
C500 Filter Capacity Assuming 1 Tray is Used | |
Media | Media Required |
Standard & Other Cylindrical Types | .73 kg |
BioGravel & SuperBioGravel | .85 kg |
C700
Two Trays 
Based on actual feedback for C1000 and overall dimensions we estimate the one tray available for biological media will hold approximately 75 cu in.
C700 Filter Capacity Assuming 1 Tray is Used | |
Media | Media Required |
Standard & Other Cylindrical Types | .9 kg |
BioGravel & SuperBioGravel | 1 kg |
C1000
Three Trays 
A customer, Frederick, reports that the Cascade 1000 Filter has three trays. Two may be used for biological media.
The trays are 7” L x 5 3/8” W x 2 3/8” H. Each tray holds 89 c in.
C1000 Filter Capacity Assuming 2 Trays are Used | |
Media | Media Required |
Standard & Other Cylindrical Types | 2 kg |
BioGravel & SuperBioGravel | 2.5 kg |
C1200
Four Trays 
Based on feedback each tray will hold 89 cu in.
C1200 Filter Capacity Assuming 3 Trays are Used | |
Media | Media Required |
Standard & Other Cylindrical Types | 3 kg |
BioGravel & SuperBioGravel | 3.8 kg |
C1500
Five Trays 
Based on actual feedback from Josh Marcell the trays are 6″ x 8″ x 2″ and will hold approximately 96 cu in each.
C1500 Filter Capacity Assuming 4 Trays are Used | |
Media | Media Required |
Standard & Other Cylindrical Types | 4.7 kg |
BioGravel & SuperBioGravel | 5.4 kg |