Hello I am new here, can anyone help me identify the serie number of my Tetra Filter? Has no tags anywhere, so not sure if is a 600,700, 800 or 1200, I need to change the canister ring and not sure which one should I order, I bought this filter few year ago then I had a break on my hobby, but now I am back to the active again
Thanks if someone could help
Thanks if someone could help