How can I lessen the amount of air or slow the air that travels through a bubble airtube for a fishtank?

I have a 29 gallon fishtank and I have an airpump attached to a airtube that goes to one of those decorative clams that opens with the bubbles that are forced into it...basically, I'm not a very crafty person...lol...No matter the size of the airpump (I have a 20 gallon one on it now) it still is constantly opening and closing to the point where the bubbles are too strong for the fish in the tank - they are scared of it...

Soo...

I want to somehow make the air that goes into it lessened, or else slow it somehow...any suggestions or ideas on how to make this happen??

Thanks!!

Buy an adjuster valve.

http://www.petsmart.com/global/product_detail.jsp?PRODUCT%3C%3Eprd_id=84552444181 1421&FOLDER%3C%3Efolder_id=2534374302030092&ASSORT MENT%3C%3East_id=2534374302023693&bmUID=1180618248 475&itemNo=5&Ntt=valve&In=All&previousText=valve&N =2

This way you can exactly control the flow. Also get a check valve to prevent water from backing up, and flooding your house.

http://www.petsmart.com/global/product_detail.jsp?PRODUCT%3C%3Eprd_id=84552444181 1424&FOLDER%3C%3Efolder_id=2534374302030092&ASSORT MENT%3C%3East_id=2534374302023693&bmUID=1180618248 406&itemNo=3&Ntt=valve&In=All&previousText=valve&N =2

Very simple and cheap, go to the pet store and get a valve fot the air supply line, you can adjust the amount of air that the clam recieves. You should also consider getting a one-way valve that will protect your tank from siphoning itself out if the line comes disconnected from the compressor. All together these parts should not exceed about $3. Very effective and cheap insurance for your pets !! I have this on all of my tanks, always have and always will !!

Put an air value on the airline and adjust it as needed.

The air valve works very well, but you could also buy a lower power air pump. For example, if you had a 40 gallon air pump, a 20 gallon air pump will reduce the bubble by half. However, this is more expensive, so I'd go with the gang valves.

~ZTM

Cheapest way - get a clothespin and put it on the hose - may take a few minutes to get the tube pinched just right so that a bit less air goes in, but you should be able to adjust it exactly how you want it.

very very very simple get a little thing that ataches onto the tube and it has a dial on it to tell you how much pressure goes through you can set and forget it