Hi Mike
I was apprehensive at first and it took me a while to adjust my head into not carrying out water changes too, but now I'm used to it. You'll just have to sit on your hands at the weekend
Carbon products are reputed to kill some types of algae by direct application of it using a syringe, but personally I wouldn't use it in a lo tech because the plants will then have to adapt to the higher carbon content while you're dosing then re-adapt if you was to stop dosing. I've learnt that plants thrive in stable conditions.
Clive advocates keeping it simple. So I did, my whole regime for my lo techs are as follows:
Feed the plants on a Saturday.
Clean filter once a month
How simple is that?
Chris