co2
Snail breathes, CO2 add Lime water = Limewater turns chalky white
I think when they receive carbon dioxide
In short, no. The oxygen they produce is from photosynthesis, which in a dead tree will by definition not be happening. There will be many products produced from its decay, like CO2. The only metabolic process that produces oxygen is photosynthesis which only requires CO2, water and light, none of which will come from a dead tree.
Because minerals and co2 is in plenty in pond water, hence plant grow well in pond water.
Snails produce CO2 all the time even if they are alive. It doesn't matter if there is light or not. Animals do not consume CO2 at all but produce it as a product.
Co2 and fertilizer in the form of poopy.
Get a pond full of plankton to absorb all the co2 out the air.
CO2 is the chemical formula of carbon dioxide.
mainly trees as they take in co2 and give out Oxygen.
A jar with snails crawling on living plants
Chloroplasts take up CO2 and give off O2.