Blue Foam variation
OK I too had a post go poof
WTF
I have tried a variation with the blue foam (Marineland Rite-Size U Bonded Foam Sleeve; aka - Eheim filterpad, aka - blue reticulated foam) for 510 carts
(I apparently do not have enough seniority to attach files yet, I have a PDF with illustrations and pictures
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I cut the 1/4 (6.35 mm) thick foam as follows:
Initial rectangular cut 10mm X 25mm
Then I cut the lower portion of the rectangle into a point:
- staring at a point 7 mm from the top, along the 25 mm side
- angle cut to a point at the center of the 10 mm bottom.
(tried a very crude illustration trying to use keyboard characters, but the post automatically removes extra spaces - geez...

)
The opening of a 510 cart (where it meets the atty) has the following dimensions:
- rounded portion to rounded portion 7 mm long
- flat side to flat side 5 mm wide
- top to the lipped edge inside 7 mm deep
(hence starting the taper cut at 7 mm)
Insert the point into the cart opening; using a straightened paperclip, work it in until the point is at the bottom of the cart liquid cavity. This will require compressing the foam near the top this creates the seal to prevent from leaking.
The top portion of the final cut foam (the rectangle portion prior to the taper) is:
- 10 mm which gets compressed into the 7 mm long portion of the cart
BY
- 6.35 mm - which gets compressed into the 5 mm wide portion of the cart
BY
- 7 mm the depth of the inside edge
Then it tapers to a point at 25 mm, which is the overall depth of the cart tank.
The taper serves a couple of purposes:
- supports the foam against the atty
- wicks the liquid into the tank during filling; toward the atty during vaping
A one material variation (that is working well for me) of the plug + spring (or straw) mod.
I can get 15-20 drops of a 50/50 VG/PG liquid into this (depending on the size of the drops) without having to remove the foam, dont even have to push it to one side as I saw recommended somewhere. Just have patience while dripping.
Vapes strong right to the end.
A couple of times, out of curiosity, I removed the foam after vaping on it for a good, long time; pressed it between some paper towels no liquid squeezed out. Also left the cart, open side down, on the paper for over an hour again, no liquid. Seemed like it totally emptied it
Still out of curiosity, I dripped 12 drops into the cart without the filler. Then I pushed the foam in none of the liquid was pushed out. After I got the foam situated correctly, I was able to add 4 additional drops
Just my $0.02
-bogie