- Make sure you are using a decent fertiliser which provides what your plants need. If you have demanding plants that means they need CO2 and lots of ferts (both trace and macros). Dose the ferts on a daily basis (not weekly) as you'll get better results this way.
- Algae is caused due to fluctuating levels in your aquarium so keep things stable - add ferts every day, perform large water changes every week (yes every week) and keep on top of maintenance. When you slack off, algae rears it's ugly head.
- Limit your lighting. The longer your lighting is on for, the more problems you may have. I suggest no more than 8 hours a day and if you're having problems with algae, drop it down to 6 hours until it levels off.
- Use a liquid carbon which helps to get rid of algae. Super popular (for that reason) and if you dose according to the bottle instructions you'll be pleased with the results.
- Ensure you have enough plants in your tank. Having a tank 30% planted is just not enough and creates instability (then algae...). Look to have a tank about 80% full of plants and you'll find everything a lot easier.
I hear this all the time and I know it's a big issue for you guys. The good thing is you don't need to sweat about it as it's easily solved. Here are my top tips: