I think the biggest issue no one has pointed out is tanks do best when there is stable and consistent parameters, light, ferts, co2. Being gone for 8 months leaving a tank to someone that doesn't have a good understanding of aquariums isn't going to help. Tanks do best when you have consistent water changes, co2 levels and dosing amounts. This will resist algae taking over and will promote good plant growth. Not trying to bash on you just trying to say consistency is key.