JBL ProFlora m500
PROFLORA m500 SILVER
JBL ProFlora m500
Properties
Electronic label / illuminant
| Mercury: | No |
| Dimmable: | No |
Technical Data
| Height: | 430 mm |
| Width: | 110 mm |
There is no general answer to this question, as we do not know what the desired number of bubbles for your aquarium is. One bubble contains approx. 0.125 mg CO2, which corresponds to 4 million bubbles for a 500 g cylinder. At a consumption of 10 bubbles per minute (600 bubbles per hour), this corresponds to 6667 hours, which in turn corresponds to around 277 days or slightly longer than 9 months of unchanged CO2 supply.
Please note that this is a rough estimate and does not represent a guarantee about how many days you can actually get out of one compressed gas cylinder.
The total weight is calculated as follows:
tare weight + filling weight = total weight
as in the example 1790g + 500g = 2290g
Please notice that the cage (protective handle) is not included in the tare weight of the cylinder.
500 g of carbon dioxide are equivalent to 11.36 mol (1 mol of carbon dioxide weighs 44.01 g).
1 mol of an ideal gas occupies 22.4 l volume under normal conditions (normal air pressure and temperature), which means the following for 500 g of carbon dioxide:
11.36 x 22.4 l = 254.48 l.
A room of 20 m2 (4 m x 5 m) and a ceiling height of 2.5 m contains 50 m³ of air, which is 50,000 l.
Carbon dioxide is heavier than air and collects at the bottom under calm conditions. The gas would be 1.27 cm above the ground with 500 g of carbon dioxide.
Then, correspondingly, 4 times higher with 2 kg.
When the CO₂ is mixed with the air in the room, 254.48 l of carbon dioxide correspond to a concentration of 0.5 % of carbon dioxide with 50,000 l room volume of a room with a size of 20 m2 and a standard ceiling height, which is in the range of the maximum work place concentration for an 8-hour working day.
Accordingly, no excessive danger is associated with carbon dioxide compressed gas systems for aquariums.
Nevertheless, a few points should be observed when dealing with a compressed gas system:
1) Please be aware that the compressed gas cylinders must undergo a TÜV test regularly every 10 years.
2) Rusty cylinders, especially with rust near or on the bottom, should no longer be used, even if they have a valid TÜV mark.
3) Do not store the compressed gas cylinders in the sun, as this causes the internal pressure to rise. Normally, nothing will happen if you do, as the cylinders are constructed to withstand pressures up to 200 bar, but the bursting disk may burst, thereby causing all the gas to escape. In this case, do not touch the cylinder without hand protection, as the cylinder becomes very cold due to the drop in pressure.
The connections on reusable CO₂ systems are generally standardised so that they can be used with other cylinders, with the exception of a few cases.
However please note the following restrictions. Some larger-sized cylinders are not approved for non-stop operation with pressure reducers and you will lose your warranty claim if you use such systems.
A general answer to this question cannot be given, as that would require additional information such as the number of bubbles per minute, whether you use a night time switch-off and how long the CO2 is supplied each day.
The storage life of a filling can be calculated approximately in a simplified manner. A CO2 bubble contains approx. 0.125 mg CO2, which is for 20 bubbles per minute of withdrawal for 24 hours 3.6 g of carbon dioxide per day or a range of slightly less than 139 days for the 500 g cylinder.
With a night time switch-off and 12 hours of CO2 supply, the range is slightly under 278 days for the same number of bubbles.
The calculation of range is analogous for the 2 kg compressed gas cylinder.
Please note two important points:
1) Cylinder: Reusable cylinders are TÜV tested and this is stamped on the cylinder. This test needs to be renewed every 10 years, with the bottom of the cylinder and the valve sealing and threaded joint being tested.
2) The carbon dioxide:
Depending on its concentration, carbon dioxide is harmful in the air.
The respiratory rate and pulse rate increase at a carbon dioxide concentration of 3-5%. Other symptoms are headaches, discomfort and ringing in the ears. Carbon dioxide concentrations of 8-10% and more cause these symptoms to become more pronounced. This may lead to cramps, fainting, apnoea and death from suffocation.
One 500 g cylinder contains 500 g CO2. This is equal to 11.36 mol (chemical substance amount unit). One mol of a gaseous substance has a volume of 22.414 l under normal conditions (273.15 K, 101325 Pa), so that 500 g of CO2 result in a volume of 254.7 l. CO2 is heavier than air, so that it collects on the ground. This corresponds to a CO2 height level in the range of 12.735 mm = 1.27 cm for a room of 20 m². If it is mixed completely with the air in a room of 20 m² and a height of 2.5 m (corresponds to 50,000 l), this corresponds to a maximum gas concentration of 0.5 volume %, which is well below the dangerous level.