Hopefully you'll never have to deal with serious mold in your house or fish room. I have a lot of mold in my home because a number of problems. And it did effect my aquariums.
At first my floating plants were getting moldy on the tops. Sort of like white speckles. I'd just kept throwing out the one effected but it just kept coming back. Till I gave up and threw them out with an exception of a few good ones with I put in a tank in a separate room. No more mold. And some with mold in an empty tank. I let the mold go and then tried spraying stuff on the surface of the plants. A regular light mist of diluted hydrogen peroxide eventually did the trick. With some plant die off. It's possible a mist of a antil fungal med for the aquarium could have worked.
Then I kept getting what I thought was a fungus on the bottom and other odd areas. It looked like some of the funguses but wasn't. Adding an antifungal does kill mold but not well enough unless you target it. Added a little tank water and the meds and turkey basted it several days in a row.
At least not seen. Reduced feeding, added an air stone, made sure the take was covered and got an air purifier. Skipped a week and did the treatment again.
I'm sure it's just waiting for the right time to come back. But at least I didn't have to tear down the tank and sterilize it.
Hope that helps someone!
We got a dehumidifier this year because our AC wasn't keeping up (im gonna assume a lot of people had this problem our apt maintenance crew trouble keeping up with maintenance). The humidity in our apartment was 60% on the hottest days, once we got the dehumidifier it dropped down to the mid 40s, once it dropped it helped out our AC. I would suggest getting a dehumidifier in areas you are treating mold, you'd be suprised at how much gets sucked out. We were regularly pulling 15 gallons a day!. I image it would completely sold your mold issue, but in conjunction with the treatments you're doing may help even more. Mold is a pita, my parents house had it growing up, the entire basement had to be sealed to reduce it. but now it's gone, mostly....
Great advice! In the summer I also kept a fan constantly running in the fish room. It's best to keep tanks covered although it was bad for the floating plants. I do have a dehumidifier running 24-7 I empty 2x day and when it rains I turn the AC temp down low enough for it to continue running. Or at least leave the house fan on. The more air movement the better.
Aquariums do put a lot of humidity in the air that can be an issue for houses as well.
Unfortunately I have moisture coming in the house via the siding, roof and foundation. Sooo. HOA is going to "fix" it. I'm gutting the house and having the mold remediated. Also, now breaking down all the tanks and starting over.
@thefishlady I run a fan 24/7 year round. I spill too much water. I think you are making the best decision breaking down you tanks and starting over. Less headaches and take your time designing your fish room starting with the size. How to heat the room, not the tanks. A large air pump to supply air to all your tanks. What kind of racks to support your tanks? What kind of lighting? And your budget.