ballpark what part of the cities? guessing by quality aquatics, northern area. im close thats one of my go to stores. used to be many more than there is now, but forest lake pets is worth a visit at least once.
with just having java ferns you dont need more than 4-6hrs of light a day. also if it is close to a window, daylight through a window will absolutely cause green water.
thats what pops into my mind. if you can afford to lose $400 buying something cheap, well whatever. 124 gallons of water loose in your home, now thats something to be concerned about.
i would start at 6-7hrs total light. especially just for anubias as they dont need tons of light. just need to find the balance between hours of light/intensity, and fertilizer.
can they be saved... yes. will it be easy, probably not. good news , those nice bright green algae free leaves show the plant is ultimately healthy. id rub off what algae i can with my fingers, then give them a spray of hydrogen peroxide.