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Welcome to the sidemount community!Well I am going to start sidemount diving
You want two 7 liter 232 bar steel tanks for cold water drysuit diving.and I am looking at squba tanks I am moving to sidemount because I am 15 years old and not that strong to carry 2 12 liters on my back so I coche sidemount.
That is a lovely and light configuration for sidemount diving in drysuit.
Please add 7 to 9 kg of lead depending on situation (BMI and salinity).
No. It is probably a bad idea. Those cylinders are heavy in water.if I shuld go with 7 liter 300bars or 10 liter 300bar
Instead, you want some weight on you belt.
Get 7 liters 232 bar steels (1600L of gas x2) . They are lovely. Add the recommended amount of lead; probably 7-8 kg on your belt/harness.
Some people do prefer the physically smaller 5 liters and 300 bars.
Due to limited compressibility of air though, these are only 5x270 liters (1350L of gas x2).
It is apparent that the 7L cylinders have more gas, but the 5L cylinders are smaller in size.
You can always add a 7L 200 bar (not 232) cylinder. That does not weigh a thing in the water.
An aluminum AL80 would be another option for extra gas.
But do start with two SM cylinders alone.
Keep your back bent.My worry is trim
It is good for many things. It is not good for extended 100ft deep dives, though. You will want 2x12/232 for those.7 liter 232 bar is not that much
Add a 7/200 or an aluminum 80 cuft tank to your 2x7/232 set when needed.
It is said above, that some people dive with 2x7/300. I do not have experience in that.
Please do remember that 300 actually means 270, because pressure increases faster than amount of air.So is it a good ider with 300bar to have as muche as possebel. (we have a 300bar pump at my culb no problem there) so all I need to know is do 300bar wheig more and how much more do they weigh. And are they balanced or do one part flot and one doesn't.
OK!I really hope u can read this since I am dislexcic and English is not my first language.