I am a newbie and orderd a ex 700 .
Was looking for a cheaper filter than eheim, saw tetratec in one of the forums in here.
http/www.zooplus.co.uk/shop/fish/technic...r_filters/19461
http/www.youtube.com/watch?v=IgI5vXicWdc
Think some parts like the taps easily broken but instantly replaced by Tetra.
Some had a primeing problem and tetra fixed that as well.
Shipped from germany they have a mains adaptor.
Other than that it was cheaper than an eheim and all the filter media is supplied, i like the spray bar.
Reviews are good and it is a quiet runner, some people love the ex 1200 but for a 25 gallon tank i think that would be overkill.
This is a replacement for my Interpet/Hydor prime 20 plus.
Ibroke it trying to put the top part on and broke the plastic casing, i wanted a filter with a top that i could remove without flooding the place and as the top was a pig to remove and change the media i wanted something easier.
Got to wait 4 days to play with it.