Hi, just received my APS External filter. It has 4 trays. It has come shipped with 1 white find filter wool in each tray. I only want to keep that in the last try right?
I have purchased some bioballs for the first tray, could you advise on what I should be putting in the middle two? Ceramic rings? Those balls? Sponge? Thanks
Lee
PS. I have a RIO 400 and planning on keeping JD's and GT's.
I have purchased some bioballs for the first tray, could you advise on what I should be putting in the middle two? Ceramic rings? Those balls? Sponge? Thanks
Lee
PS. I have a RIO 400 and planning on keeping JD's and GT's.