Probably yes on using too little weldon.do you think this was resulting from using too little weldon?
I also had problems with the syringes I used, very hard to push.
I found some glass ones on Amazon, and bought a pack of disposable needles - 100% easier to use, and the weldon doesn't try to fuse the syringes together.
I redid the frag tank with the new syringes and it went much better.
I'm up and running again - minus the light I bought and didn't like. Waiting for another one.