I was think of doing a co2 system for my 15 gallon aquarium. I was thinking of doing a sodastream co2 kit or using a fluval co2 kit. I don't won't to have a full pressurised co2 system as I am not willing to spend $250+ just for a co2 system. Resources are limited as I live in Australia.
Thanks for all your help
Baydo
I was in the same boat you are in, I started out with a soda bottle and used that for about a year until I bit the bullet and went pressurized.
I know money is not a luxury in most cases, but after I switched man did it make my life easier.
Look up systems that will work on paintball tanks, I got a budget one and 8 years later it is showing its age, but it still works. A 24 once paintball tank would last me most of a year on a 15 gal.
Price out the ingredients or cartridges multiplied by how many refills you will need per year, the cost can add up to a pressurized system in shorter time than you think. Around me I can either buy a one pack or a three pack for the same cost, $30. If I used 1 per month, I would be at $120 a year plus $130 for the kit. So basically what a full pressurized system is. Check local ads, you can find some used units usually.
I'm from Canada which makes most things almost twice as expensive as the States, so I know your pain when looking for hardware.
Think of a pressurized system as more than just CO2, it really allows for stability and consistency which is far more important in the health of a tank.
Either one you mentioned can suit your needs, you will be battling with trial and error until you get it right though.