SRC Member ervine Posted April 14, 2004 SRC Member Share Posted April 14, 2004 Hi guys, I've been trying to hunt down a bioball to use to mod my Maxijet 1200 impeller but everyone that I've come by has been unsuitable, either too soft or not the right type of bioball... Any ideas where can I get a suitable one?? Thanks, Ervine Quote Link to comment Share on other sites More sharing options...
SRC Member ervine Posted April 15, 2004 Author SRC Member Share Posted April 15, 2004 Nothing? Quote Link to comment Share on other sites More sharing options...
huiwen Posted April 16, 2004 Share Posted April 16, 2004 You did not see this thread before ? he is the guru of diy. http://www.arofanatics.com/members/nitro/i...erwithpinwheel/ cheer, Quote Link to comment Share on other sites More sharing options...
SRC Member ervine Posted April 16, 2004 Author SRC Member Share Posted April 16, 2004 Dog hair brush huh... okay will consider... Quote Link to comment Share on other sites More sharing options...
SRC Member ervine Posted April 17, 2004 Author SRC Member Share Posted April 17, 2004 Shucks... tried finding bioball at another LFS today and AGAIN cannot find a suitable one... Even went to petstores looking for the dog brush.. also cannot find.. ARGH!!!! Quote Link to comment Share on other sites More sharing options...
SRC Member nicky30092002 Posted April 17, 2004 SRC Member Share Posted April 17, 2004 Shucks... tried finding bioball at another LFS today and AGAIN cannot find a suitable one... Even went to petstores looking for the dog brush.. also cannot find.. ARGH!!!! y not juz ask/pay bro THC to do for U .. imo he did a beri good job. Quote Link to comment Share on other sites More sharing options...
SRC Member ervine Posted April 17, 2004 Author SRC Member Share Posted April 17, 2004 y not juz ask/pay bro THC to do for U .. imo he did a beri good job. Haha.. that defeats the purpose of DIYing.. i like making things myself.. it's sort of a hobby for me.. Quote Link to comment Share on other sites More sharing options...
SRC Member typrobin Posted April 17, 2004 SRC Member Share Posted April 17, 2004 dun get the dog hair brush....go to a pasar malam and get the kind of comb tat pple use to wash their hair....i'll be buying it later (to mod impeller, not wash hair)....will post a pic tonight... i think the dog hair brush is very ex...the pasar malam one is only $0.50.... Quote MY OLD 3ft!! My Latest Plan!! Link to comment Share on other sites More sharing options...
SRC Member ervine Posted April 17, 2004 Author SRC Member Share Posted April 17, 2004 hm... okay I go check it out later see if can find anything suitable or not... Quote Link to comment Share on other sites More sharing options...
SRC Member ervine Posted April 17, 2004 Author SRC Member Share Posted April 17, 2004 Hm... still couldn't find the brush.. found one but it's base was curved, so not suitable... Anyway, I bought something else, those plastic brush that we use to wash clothes with... Damn cheap, $1 for 2... U guys think this will work?? What I'm afraid is that there the bristles are too close together and might result in a lack of water flow... but if that's so I can simply snip them off... How is it feasible? Don't wanna chop the fans of my MJ impeller only to find that this won't work... Quote Link to comment Share on other sites More sharing options...
SRC Member ervine Posted April 17, 2004 Author SRC Member Share Posted April 17, 2004 Here's the back view... the plastic backing about 1mm thick.. should be just nice to mod... just the bristles are a bit worrying... Quote Link to comment Share on other sites More sharing options...
SRC Member ervine Posted April 23, 2004 Author SRC Member Share Posted April 23, 2004 hey it works like a charm!!! In fact I can push a lot more air in than before without it starting to rattle insanely... Will post pics soon.. Digicam cable not with me... Quote Link to comment Share on other sites More sharing options...
SRC Member weisoon Posted April 24, 2004 SRC Member Share Posted April 24, 2004 ervine There are better ways to making a needle wheel, example using PVC, which will give you stiff 'needles'. Very cheap also, maybe just $2-$3 only just that will take some time to make it. Quote Link to comment Share on other sites More sharing options...
SRC Member ervine Posted April 24, 2004 Author SRC Member Share Posted April 24, 2004 i don't get how u use pvc to make the needles leh... doesn't matter lah.. whatever works... actually the bristles of the brush are quite stiff when they are so short... so no worries... in fact the original MJ impeller fins are soft too! Quote Link to comment Share on other sites More sharing options...
SRC Member Ancelot Posted April 24, 2004 SRC Member Share Posted April 24, 2004 sorry people, i really do not understand how this needle impeller suppose to work.. for example if we fix a needle impeller to our pumps, shouldnt it be just chopping up the water? if its chopping up the water then where does the tiny bubbles come from? my skimmer is a venturi skimmer. The air inlet for the skimmer is on the skimmer not the pump itself.. so i was thinking how does your impeller suppose to improve the size of the bubbles when the air inlet is on the skimmer and not the pump? isnt that modifying the impeller is just mainly to chop up the water? so whats the difference??? if anyone can explain this, also provide pics for me to see...hopefully i understand!!! thanks~ Quote Link to comment Share on other sites More sharing options...
SRC Member ervine Posted April 24, 2004 Author SRC Member Share Posted April 24, 2004 Well basically for starters, most venturi driven skimmers get their bubbles solely from the venturi, which is often placed AFTER the impeller... In this case, the venturi is placed BEFORE the impeller... so when the bubbles hit the impeller it chops them up even more than what any venturi can do... In the case of a needlewheel impeller, it's "spikes" or protrusions work differently from a typical impeller which is meant to push water, this is meant to chop up air bubbles... Maybe this pic might help you see how the needlewheel can chop up water... it's my DIY needlewheel impeller.. not very nice but it gets the job done Quote Link to comment Share on other sites More sharing options...
SRC Member Ancelot Posted April 24, 2004 SRC Member Share Posted April 24, 2004 so the needlewheel impeller basically pushes the water faster through the venturi in which this means by chopping up the air bubbles la? so do you supply the air bubbles before the venturi or after the venturi? can sms me this is my hp 98571283 want to talk to you about it.. thanks.. am i right to say that?? if right then i go diy myself one.. not quite happy with my macro.. lolx.. Quote Link to comment Share on other sites More sharing options...
SRC Member ervine Posted April 24, 2004 Author SRC Member Share Posted April 24, 2004 before.. that's the whole point... so bubbles enter via venturi then further get chopped up by impeller... and water goes slower not faster... slower because the needle wheel is not as effective in moving water... check out the first few pics in my other thread here http://www.sgreefclub.com/forum/index.php?showtopic=14736 Quote Link to comment Share on other sites More sharing options...
SRC Member alanseah Posted April 24, 2004 SRC Member Share Posted April 24, 2004 i don't get how u use pvc to make the needles leh... doesn't matter lah.. whatever works... actually the bristles of the brush are quite stiff when they are so short... so no worries... in fact the original MJ impeller fins are soft too! oic.. so this is how u do it... me been also wondering how u do it.. u need to cut it short.. ok now my turn to go try it... me also trying to search for the animal bush but cant find it also.. Quote Link to comment Share on other sites More sharing options...
SRC Member Ancelot Posted April 24, 2004 SRC Member Share Posted April 24, 2004 then i dont think my pump can do it unless i supply it with a control valve and an air pump cos my PH air inlet is a default one.. somehow pushing water out of it.. crazy manz! Quote Link to comment Share on other sites More sharing options...
SRC Member ah^siao Posted April 24, 2004 SRC Member Share Posted April 24, 2004 hey bro ervine mind showing a pic of the bubbles aft being chop out by your impeller???? Quote Link to comment Share on other sites More sharing options...
SRC Member ervine Posted April 24, 2004 Author SRC Member Share Posted April 24, 2004 hey bro ervine mind showing a pic of the bubbles aft being chop out by your impeller???? Here's the view of my tank... width is 1.5ft so the modded MJ can still push enough water across this length and more... Quote Link to comment Share on other sites More sharing options...
SRC Member ervine Posted April 24, 2004 Author SRC Member Share Posted April 24, 2004 Here's a closer look at the bubble spray... note that I've managed to open the air intake all the way without the pump getting excessively noisy... something I could never do with the original impeller Quote Link to comment Share on other sites More sharing options...
SRC Member ervine Posted April 24, 2004 Author SRC Member Share Posted April 24, 2004 Last pic is a close up shot showing how fine the bubbles are... IMO they are pretty darn fine... Quote Link to comment Share on other sites More sharing options...
SRC Member onghm Posted April 24, 2004 SRC Member Share Posted April 24, 2004 Thanks for sharing. An eye opener on what can be done to a powerhead Quote Link to comment Share on other sites More sharing options...
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