fx5 micro bubbles, noise, final solution

  • We are currently upgrading MFK. thanks! -neo
J

Jean-F

Feeder Fish
MFK Member
Apr 11, 2008
14
0
0
Rawdon Quebec
Hi
I just finish all test and here is the final solution.
Just add a air tube to the internal air outlet.
Picture describe better my solution.http://i408.photobucket.com/albums/pp166/Lachaine_56/P41413432.jpg

No more noise, or air in the filter, and no more micro bubbles.

P41413442.jpg
P41413432.jpg
 
I can see this helping with the release of air since it will now be sucking in air/water all the time through the tube. I can also see it not doing the job intended since there will still be high pressure in the output side and less pressure in the canister, but since the water will rush past the tube, it may create a low pressure zone right in front of it and suck the air/water out.

How have you tested this? I think you should fill the canister 3/4 of the way, keep the valves closed, start the pump (keep the valves closed) and wait till the pump shuts off. When it turns back on, open the valves and see if the canister purges. The pump will not over heat or burn out by doing this. There will still be very little water circulating within the canister because with the valves closed, water will be forced back through that tube to the center of the baskets at the top.

The reason something like this has not been done in the Fx5 from the start is because they would not be able to say its "bypass free" since you would not bypassing some water. Not much to make a difference though.

This will not resolve the micro bubble issue when its due to the vapor cavitation of the impeller.
 
if this proves to be successful then I may do this in my modded filter for a temp or perm solution to the issue I have.

I may have some tubing so maybe I will do this over the weekend too.
 
Well, what can I say more.... you found what is the principle of my solution.
There still very small air purge every day, but no comparison with the unmodified filter.
Before its take several on-off to purge the filter for one day working. Now only one small purge (automatic on off from filter)
And you are right, it will not solve the cavity problem if your filter is clog.
The micro bubbles and air noise problem, is when you have a lots of plants, co2 injection, and lots of lights. (this is my case)
 
The micro bubbles and air noise problem, is when you have a lots of plants, co2 injection, and lots of lights. (this is my case)
Click to expand...

Ah I see. I think I have heard about this issue before. Maybe it was you. did you try the silicone rubber flap idea? I think that may have been you but not to sure.
 
Yes the rubber valve was my idea, and was not so good. It's accumulate air inside of the filter. When filter stop there was a lots of air going out, and still some inside.
My last solution with the tube is perfect. No more air inside and out.
 
I tried this tube but it did not work at all as described for me. What I did was I had the canister about 1/2 full of water. I kept the valves closed and turned on the filter, I then opened the valves one by one and the filtered did not purge at all. In fact, I think I head the water being pushed back into the canister like it would before.

This was my experience with it.
 
Hola, my mod is not for this. I do not need to remove half the tank of air!!!
It is only to remove the air that is building inside the filter. What I can tell you, is the amount of air that this mod remove, is enough to remove the air buildup.
And it's do not change the fact, that when the filter, stop, it is purging is air.
 
Hola, my mod is not for this. I do not need to remove half the tank of air!!!
It is only to remove the air that is building inside the filter. What I can tell you, is the amount of air that this mod remove, is enough to remove the air buildup.
And it's do not change the fact, that when the filter, stop, it is purging is air.
Click to expand...
It doesn't matter if it for a little air or lots of air. If there happened to be a low pressure zone created in front of the tube to allow air to escape out of the already low pressure canister, than no matter what amount of air there is, air would escape.

The zone in front of the tube inside the output tube would have to be LOWER than the pressure inside the canister filter. This is hard to believe considering the head pressure the pump is working against.

Water would also be flowing through the purge tube at all time into the output tube.

Unfortunately this did not work for me. The more air inside the canister the more pressure build up there will be to force it out. What I experienced was water flowing through the purge tube FROM the output and this is what it does normally.

I know it doesn't change the purging when the pump shuts off.

I commend your mod. If it works for you, great.
 
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