Can't Get Syphon Going

[MermaidMel]

That is indeed a puzzle Mel. Maybe there is a gasket or similar item that is causing a leak on the inlet side of you filter. Noise that indicates a suction leak means that you have yet to figure out where to look for the air leak. That is not a condemnation of your search but a hint that the source of your air must be on the inlet side of the flow path. Air will not accumulate anywhere on the discharge side of the impeller and an impeller problem will be far from silent. An inlet air leak will give occasional noisy symptoms and will give the bubbles you have been seeing. The possibilities are a filter casing leak or a inlet tubing leak. If you have eliminated the possibility of one, you need to look to the other possibility for your problem. I wish there were more I could do to really help you find your problem. Unfortunately, the best I can give you is hints of where to look.

Thank you, I think I may have located the air bubble problem, was where the hose is going back into the water, it was just out of the water (the rubber join) but is still somewhat noisier than my previous Fluval 205, which was newer. In hindsight it may be preferable to buy a new unit when I get my new tank next week

 

[MermaidMel]

Out of interest, does it harm the fish at all if there is air leaking in and going into the tank? Might sound a silly question in a way I would imagine the fish might like it??

 

[OldMan47]

Bubbles are generally not a problem for fish. Some of the plant people who use CO2 would tell you that you don't want that much water stirring near the surface because it would drive off the CO2 that they spend so much effort to put into the water.

 

[simonas]

you;ll have to suck harder!!

 

[MermaidMel]

you;ll have to suck harder!!

Trust you to say that!!!

 

[MermaidMel]

Bubbles are generally not a problem for fish. Some of the plant people who use CO2 would tell you that you don't want that much water stirring near the surface because it would drive off the CO2 that they spend so much effort to put into the water.

Ah well I'm always up for a bit of surface agitation, fish seem to love it and stops the film so as long as it's ok, but now ordered a Eheim brand new one, so hopefully no more problems with old 2nd/3rd hand filters from now on

 

[simonas]

you;ll have to suck harder!!

Trust you to say that!!!

 

[raptorrex]

Out of interest, does it harm the fish at all if there is air leaking in and going into the tank? Might sound a silly question in a way I would imagine the fish might like it??

i think its more the impeller that, dislikes the bubbles.