Replacement Diffuser Plates for KoiAir Aeration Kits. The single stick diffuser plate fits the KoiAir Mini Aeration System. It measures 10"L x 3" W. The dual stick diffuser plate provides the KoiAir 1 and KoiAir 2 Aeration Systems and measures 10"L x 12"W. Each plate includes a 3/8" barbed fitting to connect to a 3/8" weighted airline.
