Why not just get on top of maintenance, and dose liquid carbon to the water column......the algae should go of its own accord and no need to do a full strip down if you don't need to. Then get back into a routine of regular weekly maintenanceI might try a full black out for a few days and massive water changes and then try liquid carbon. If I do use LC it will have to be part of a full tank strip down as the hard scaping is so large and the tank so deep and there's so much algae.
(I know it's largely down to lack of maintainance, so that needs to change too.)
Why not just get on top of maintenance, and dose liquid carbon to the water column......the algae should go of its own accord and no need to do a full strip down if you don't need to. Then get back into a routine of regular weekly maintenance
Cheerio,
Ady.