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1. Tunze master circulation 1073.090 $175 1 year of use in fresh water. Perfect working condition clean and ready to go. 1.5" in/outlet
Master electronic 1073.090
(1073.090)
Pumping capacity: 8,300 l/h
(2,190 US gal./h)
Energy consumption: 120 W
Pumping head: 5 m (196.8 in.)
Voltage / frequency: 230V/50Hz (115V/60Hz)
Aquarium Plant Electronic CO2 $100 use for 3 months i have two. I paid $200 shipped.
AquariumPlants.com's Electronic Co2 Regulator NOTE: This is an "introductory price" This product has forever changed the introduction of Co2 in to an aquarium...Used for co2 injection for a freshwater planted aquarium, or a Calcium reactor in a saltwater application. We guarantee, that, nowhere on this planet can you find a BETTER or MORE PRECISE regulator! (This is OUR baby, we built it, tested it, and patent it) The problem of "dumping" is completely eliminated with our regulator. Dumping is always a problem with (ALL OTHER) regulators which utilize a needle valve. Simply because, a needle valve relies on the pressure on both sides of it for it's accuracy. So, even though you have it set at a certain "bubble rate", once the pressure in the cylinder (or the outside atmospheric pressure) changes, so will the amount of co2 that passes through the needle valve. This is why it is physically impossible for any and ALL other regulators that rely on a "mechanical needle valve" to ever be consistent. Our regulator does not have a needle valve, but instead, it has an electronic valve that opens and closes in a fraction of a second, (each "opening & closing" equates to a bubble) and, due to the fact that it is "electronic" the "bubble rate" can NEVER change, and, once it is set, it can never vary more than "+/- 1/1,000 of a second.
Master electronic 1073.090
(1073.090)
Pumping capacity: 8,300 l/h
(2,190 US gal./h)
Energy consumption: 120 W
Pumping head: 5 m (196.8 in.)
Voltage / frequency: 230V/50Hz (115V/60Hz)
Aquarium Plant Electronic CO2 $100 use for 3 months i have two. I paid $200 shipped.
AquariumPlants.com's Electronic Co2 Regulator NOTE: This is an "introductory price" This product has forever changed the introduction of Co2 in to an aquarium...Used for co2 injection for a freshwater planted aquarium, or a Calcium reactor in a saltwater application. We guarantee, that, nowhere on this planet can you find a BETTER or MORE PRECISE regulator! (This is OUR baby, we built it, tested it, and patent it) The problem of "dumping" is completely eliminated with our regulator. Dumping is always a problem with (ALL OTHER) regulators which utilize a needle valve. Simply because, a needle valve relies on the pressure on both sides of it for it's accuracy. So, even though you have it set at a certain "bubble rate", once the pressure in the cylinder (or the outside atmospheric pressure) changes, so will the amount of co2 that passes through the needle valve. This is why it is physically impossible for any and ALL other regulators that rely on a "mechanical needle valve" to ever be consistent. Our regulator does not have a needle valve, but instead, it has an electronic valve that opens and closes in a fraction of a second, (each "opening & closing" equates to a bubble) and, due to the fact that it is "electronic" the "bubble rate" can NEVER change, and, once it is set, it can never vary more than "+/- 1/1,000 of a second.
