Hi Dinesh,
Really I would strongly advise to stay away from yeast based systems in general, and on that size tank in particular, because that's another set of problems altogether, primarily because you have very poor control of the gas production, which induces some forms of algae that are a lot tougher to get rid of than brown algae. If you're going to do gas then do it right.
There are many different competent gas cylinder regulators, so that part is easy, but the difficult part is always finding a regular supply of the gas. You can use CO2 fire extinguishers and follow the guide in the Tutorial section
Fire extinguisher CO2 | UK Aquatic Plant Society or you can use any cylinder that contains liquid CO2 such as beverage cylinders or welding cylinders. There should be an industrial gas company or companies that supply professional CO2 cylinder rentals and refill/replacement.
The most important feature of the cylinder, wherever you get it from, is that the coupling on the cylinder valve uses the European standard DIN477. In that way, you can fit a regulator like the one shown here on TGM website:
Aquamedic Regulator
Then, to control when the gas turns on and off automatically (without your having to remember every day) you would do well to get a solenoid like the on pictured on
TGM SolenoidNow, this isn't strictly required, because you can just leave the gas running 24 hours per day. It's probably worthwhile to try both ways, just to see which is more hassle free and which gives the best results. If you do use a solenoid then you'll need a timer to tell the solenoid when to co on and off and when to turn the tank lights on and off. I'm just being lazy here, so I'm staying on the TGM website just to show you examples:
Electro-Mechanical Timer
Again, I'm also assuming that India uses 220V and those big cumbersome three-pronged plugs. I'll let you figure out any needed adapters, especially if you wind up buying from Asia, or from mainland Europe instead of UK.
The next thing you need to think about is how to mix the gas with the water. For smaller tanks, it's easy enough to put an "airstone" like disk inside the tank, but for behemoths such as what you have, it might be a better idea to use what's called an "in-line" device where the output of the filter mixes with the gas before it returns to the tank. These devices seem to work better in larger tanks, but it's up to you depending on how elegant you want the tank to look. Have a look at this page:
TGM Diffuser Types
The only two in-line devices on that page are the
Aquamedic AM1000 and the
CalAqua
There are other types such as the UpAtomizers that are less expensive and work just as well as these. If you are handy, you can even make your own reactor out of nothing more than PVC tubing and some fittings.
After these items, the rest are sundries such as CO2 compatible tubing and dropcheckers, 4dkh water and pH reagent, all of which are very easy to get. I would suggest that you stick with any of our sponsors who sell this gear. AquaEssentials offers similar equipment.
Hope this helps!
Cheers,
