1. The Triton tank uses the same replacement heads as a Kanger T2. These heads (short wicks) are approx $1.50 each at litecigusa or Mt Baker...so you could swap the heads out. The whole T2 tank also works on a Triton battery...just doesn't screw all the way down leaving a 1/4" or so gap.
2. The Halo mini tank is good for taste testing...but get Kanger T4s available cheaper at litecigusa for $2.25 each or Smokeless Image for $2.99 each. They are easy to flush and clean.
3. If you have cartomizers, pull out the filler leaving the center tube. A couple of drops of juice give you several puffs for testing. Easy to clean out and reuse.