Guys here we go :
For the 801 cart a larger cell reticulated foam works best.
For the joye 510 or smaller carts use a smaller cell reticulated foam.
The larger cell foam i found is yellow in color and the brand name is AQUA CLEAR.
made by a company called HAGEN.
Rolf C. Hagen Inc.
Product name is "AquaClear 50 Foam Insert".
This foam works wonders in the 801 cart, because it holds liquid somewhat and you can fill the cart up due to the large cell configuration.
I have a picture to show you the exact size of the foam insert for the cart.
Do not compress this foam in the cart. it's size should be 1.2" long by 0.4" by 0.4"
2. For the smaller carts, there is a smaller cell reticulated foam that works better.
the one i am using is brand name MARINELAND "RITE SIZE FOAM SLEEVES"
This insert should be cut 1" x 0.2" 0.2" .
If you drip to one side of the cart , the cart fills up and you will not need a straw or spring...
The yellow reticulated foam has transformed my janty stick.
I do not need to top off the cart anymore, it lasts for 100 puffs.
Furthermore the foam is washable...and it does not get all stiff like fluval or polyfill.
Here are pictures.
I have tried burning the foam, and trust me , you will smell or taste it if it burns. So should your atty fail, you will smell it long before it harms you.
So any "NAY" sayers...go find something better..and return once you have succeeded!!
(Sorry but i'm getting some heavy resistance from a few people who criticize but do not come up with solutions to the problem).