5 comets at that size will make cycling quite difficult, you need very frequent water changes especially in a tank that size. Or as suggested above you could get some filter media from the pond and put it in the tank, that will have some bacteria on it and help speed up or kick start your cycling. Quote. Aquarium filter part for jebo canister filters - approx 22cm dia (was JB191a). Colour may vary . Also can be used with Aqua Nova NCF-1000/NCF-1200/NCF-1500 Your Price AU$14.55. Item # TS-AP119. Jebo Motor Pump Unit for R119/R3100/R3126/R390 Jebo spare part AP119B (note chinese plug - AU adapter included)