My vision 260 currently has a eheim 2215 and a hailea h12 external (rated for upto 260l)The eheim has just sponges and the floss on top,the hailea has noodles,balls,sponge and the floss.They both run spray bars.My problem is that theyre both just trickling and i'm sure they cant be doing a very good job.I have flushed and cleaned both(not at the same time)but it doesnt seem to help much.The eheim i have only had about 3 months and the hailea came with the tank about 8 months ago.Is there an optimum distance they should be from the inlet?Should the hoses be an optimum length?The eheim came with no instructions and the web instructions dont go into much detail.The hailea instructions are in badly translated english and practically unreadable and the website is totally japanese or something lol.Would it be practical to swap and move the media about?and would it help?Any advice gratefully recieved.