If the HOA had raised your monthly fee instead of adding submeters do you think that you would be entitled to raise the rent for that reason alone ? (answer is NO unless it was in the lease)
What part of “water is included in the rent” that you put in to the rental agreement is confusing ?
It sounds like you bought a condo as a rental property, which is the worst type of property anyone can buy as a rental, and an even worse decision for a first time investor.
I can almost guarantee you that your monthly fee will never go down, and it will not stay the same, it will only go up.
Wait until you get a $500 or $1000 assessment for an HOA deficiency that you cannot dispute.
You cannot pass these on to your tenant.
HOA’s are ticking time bombs, often run by inexperienced people who think they know what they are doing, but really don’t.
If they had not done the submeters, they would have raised your monthly fee.
ALL HOA’s need money to maintain the complex and reserves and there are only a small group of people who MUST pay that money.