SamH Posted December 29, 2009 Report Share Posted December 29, 2009 http://www.trademe.co.nz/Home-living/Pe ... 222485.htm Could that be used externally to create an inline filter? I was thinking of putting a pipe on the in end at one side of the tank and the out at the other side. With the power head outside of the tank, would it work? Thanks! Quote Link to comment Share on other sites More sharing options...
spoon Posted December 29, 2009 Report Share Posted December 29, 2009 i dont think that pump would be suitable, some of the pond pumps you can buy bigger higher quality ones(i have a 1300lph pondmaster) can be used inline the pump would most likely have to be below the water level ,not above the tank as it would be too difficult to prime otherwise Quote Link to comment Share on other sites More sharing options...
SamH Posted December 30, 2009 Author Report Share Posted December 30, 2009 The pump could be below the water line, it's just up there for clarity. Quote Link to comment Share on other sites More sharing options...
SamH Posted December 30, 2009 Author Report Share Posted December 30, 2009 Could this work? Or would it be better if the power head was on the other pipe (sucking)? EDIT: The blue box underneath is a closed canister filter. Quote Link to comment Share on other sites More sharing options...
Ira Posted December 30, 2009 Report Share Posted December 30, 2009 I had a fluval 404 running like that for about 3-4 years. The pump in the 404 died so I had a powerhead feeding it. There's no reason your idea shouldn't work fine. Only issue was that the cannister was at a bit of positive pressure due to being force fed rather than having the water sucked from it like usual. With the 404 it caused the handles that tighten the top down to pop open a few times until I started wrapping a couple loops of tape around the whole thing to keep them down. Quote Link to comment Share on other sites More sharing options...
SamH Posted December 30, 2009 Author Report Share Posted December 30, 2009 Thanks Ira Now I need to find a large enough and water tight container. :-? Quote Link to comment Share on other sites More sharing options...
Cricketman Posted December 30, 2009 Report Share Posted December 30, 2009 The warehouse, The warehouse, where everyone gets what they pay for!! Quote Link to comment Share on other sites More sharing options...
livingart Posted December 30, 2009 Report Share Posted December 30, 2009 powerheads are usually designed to run in tank so generate a lot of flow but not much pressure putting the canister level with the tank will help Quote Link to comment Share on other sites More sharing options...
SamH Posted December 30, 2009 Author Report Share Posted December 30, 2009 Would a pump be better than a power head then LA? Quote Link to comment Share on other sites More sharing options...
Ira Posted December 30, 2009 Report Share Posted December 30, 2009 powerheads are usually designed to run in tank so generate a lot of flow but not much pressure putting the canister level with the tank will help Should be fine, the 1300LPH powerhead I was using still pumped nearly as much as the 404 did. And raising the cannister won't change anything in a closed system unless you shorten the hoses, it will still be pumping at the same static head regardless of cannister height. Quote Link to comment Share on other sites More sharing options...
spoon Posted December 30, 2009 Report Share Posted December 30, 2009 i run an aquiss 2200 with a swimming pool paper cartridge filter as a pre filter there is a pondmaster pump running inline to boost the pressure before the pre filter . im also running a broken sicce genio external on a 7l tank its powered by a 400lph pump in the tank it works well . also my fluval 1o1 is helped out buy a small internal filter. it may be easier to use a tray above the tank like a top filter than find a water tight container and plumb it so its water tight Quote Link to comment Share on other sites More sharing options...
Stella Posted December 30, 2009 Report Share Posted December 30, 2009 The pump should be on the return hose, that way it draws the water through, rather than pushes it through, which is less pressure (and thus wear) on the motor. Quote Link to comment Share on other sites More sharing options...
alanmin4304 Posted December 30, 2009 Report Share Posted December 30, 2009 A pump pulling may be subject to capitation. Quote Link to comment Share on other sites More sharing options...
Cricketman Posted December 30, 2009 Report Share Posted December 30, 2009 Cavitation? The formation of vapour bubbles of a flowing liquid in a region where the pressure of the liquid falls below its vapor pressure. Cavitation is usually divided into two classes of behavior: inertial (or transient) cavitation, and noninertial cavitation. Inertial cavitation is the process where a void or bubble in a liquid rapidly collapses, producing a shock wave. Such cavitation often occurs in pumps, propellers, impellers, and in the vascular tissues of plants. Noninertial cavitation is the process in which a bubble in a fluid is forced to oscillate in size or shape due to some form of energy input, such as an acoustic field. Such cavitation is often employed in ultrasonic cleaning baths and can also be observed in pumps, propellers, etc. Since the shock waves formed by cavitation are strong enough to significantly damage moving parts, cavitation is usually an undesirable phenomenon. It is specifically avoided in the design of machines such as turbines or propellers, and eliminating cavitation is a major field in the study of fluid dynamics. probably more than neccessary but I for one found the extra bit interesting.... especially the 2 types... Quote Link to comment Share on other sites More sharing options...
Ira Posted December 30, 2009 Report Share Posted December 30, 2009 Yeah, cavitation. Capitation would be...I dunno, putting a head on something as the opposite of decapitation? I don't know if the pumps we're likely to use would have any cavitation problems, but I did find that the powerhead I used on my 404 was noisier when sucking through a restriction than blowing. Same for a couple laguna pond pumps I have. Possibly is cavitation, it's hard to tell. Sounded more like the impeller rattling. Quote Link to comment Share on other sites More sharing options...
alanmin4304 Posted December 30, 2009 Report Share Posted December 30, 2009 Thanks for the correctin speeling was never my best subtect. Quote Link to comment Share on other sites More sharing options...
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