Selling G1 NYOS DUAL Media Chamber as running out of space. The item is in good condition. Additional DIY protection done for chamber 1 and 2 so that the media doesn’t get stuck. Works perfectly like a Gen2 version. The difference between G1 and G2 is that the media chamber is seperated with mesh support so that media doesn’t get stuck. A simple DIY fix in G1 system can save a lot of money since there is no difference in functionality wise. Pls Pm for price .