Sugest you have a talk with your poolshop before you do anything I have never seen a black algae contamination as bad as you describe. IE it may not be black algae.
enzymes are never consumed in a chemical reaction, therefore the answer to your question is that enzymes that affect the speed of a chemical reaction without being consumed are indeed called enzymes.
yes indeed
ENzyme
No. There is no type of a catalyst that is consumed in a reaction.
A reactant is a substance that is consumed in a chemical reaction.
Catalyst
Mass is conserved in a chemical reaction, but the coefficient attached to the reactants may be different than the products.
chemical
chemical
if antioxidants are being consumed continuously during radiation treatment it may not be as effective and certain body functions may be disrupted.
In a chemical reaction the limiting reagent is the compound totally consumed when the reaction is complete.
Energy is stored as chemical energy in human body. It is consumed when required.