system fig2 a shows a second embodiment of the present invention featuring a cartridge 32 comprising a body 33 and a plurality of bores 34 in which the enzyme blend 10 is contained the cartridge 32 can be delivered to a gutter by means of a projectile launching device 36 shown in fig2 b the projectile launching device 36 comprises a barrel 38 into which the cartridge 32 is inserted an actuating handle 42 allows the user to compress a spring 40 to a multitude of positions which results in exerting varying amounts of preload on the spring 40 these positions and associated spring preloads provide the user with the ability to launch the projectile into gutter systems of varying heights for example one position may be designed to reach a typical first story gutter while another may incorporate additional spring preload so that a second story gutter may be reached a third embodiment of the present invention depicted in fig3 a 3c comprises and open slit bobber 44 featuring of a securing surface 46 and body 47 which houses the enzyme blend 10 the body 47 comprises opening slits 45 which expose the enzyme blend 10 to runoff water as shown in fig3 c the bobber 44 is attached to a gutter 50 on a cross member 52 by means of a tether 48 shown in fig3 b the tether 48 attaches on one end to the securing surface 46 of the bobber 44 and on another end to the gutter.