Hello all, I have an Epson C88 and I just connected the CISS. I think that I had the inks higher than the printer the first night because a lot of my ink has evaporated! I repositioned the outside inks to be at the same level as my printer (is this correct?) Also, the lil filters that go in the CISS system on the ink cartridges outside of the printer, do they stay in all of the time or only when printing? Maybe that is why the ink has evaporated ... because I left them in overnight. Thank you for your help!