For the interest of saving money, but still getting a quality rig.. I would piece the stuff together. The Aquatek regulators are relatively new to the market but they've been getting good reviews and are competitively priced.
Here's a shopping list:
-Aquatek Regulator (
Look it up on Ebay) -
$79.99
-comes with tubing and bubble counter w/ integrated check valve
-Fluval Diffuser (
here) -
$7.56
-U.P. Aqua Co2 Drop Checker (
here) -
$8.94
-4 dKH Reference Solution For Co2 Drop Checker pH (
Look it up on Ebay) -
$7.50
Total Cost =
$103.99
Now you can use the money I just saved you and buy a 5 LB CO2 Cylinder, Aluminum tank. Found one on Amazon with good reviews for $66.98 (
here)
Grand total w/ 5lb co2 tank -
$170.97
Looks like it comes out less than that kit + you get tubing, co2 tank, and 4 dKH solution