Hi Matrix 99,
One solution would be to connect a powerhead to the output of your fluval, so the powerhead pulls the water through your fluval.
I have had fluval externals for many years now and have never had any functional problems, apart from a worn out impeller, which was quite easy to change. In fact when I needed a new one a few months ago ,I bought another 203 instead of the new ?04 range , which reputedly has quite a few problems.Even now, the ?03 range is heavily discounted due to the new 04 range, especially from the mail order suppliers..
The only time I get air trapped in the top of the fluval is after a filter clean out, or if the filter is swiched off for a period of time(due to denitrification).I remove the air in the filter by turning it on its side briefly, while switched on.
I find that Eheims are overpriced.
Regards,
Des
