I keep my light on for around 10-12 hours per day
That might be contributing, you could try cutting it back to 7 or 8 hours as that'll give the algae less to feed off. I suffered with this stuff in an old tank and poor water quality contributed to my own issues, which I didn't really understand at the time, so you could also try large daily water changes to help.
OK, will do! Thanks for your help
1 part of bleach to 20 parts of water, put plants and ornaments in for 3 mins then wash them with water.
And does it kill the black beard algae?
Yes, I do it all the time
OK well like mentioned above, you're going to have to keep doing them if you don't sort out what's causing it in the first place. Post us a photo of your tank so we can have a look at the algae as well, we might be able to spot something else you've not thought of. Lcc mentioned your lights being on too long which is a great place to start, getting a timer is very useful, it will take care of turning on and off the lights without you having to worry about it. How often are you doing your water changes and how much are you replacing?
OK, I promise I will stop being lazy and do weekly water changes, thank you for your help.Very nice
I think you and I have had discussions before about water changes? 40% is a fair amount to change but to only do it fortnightly could be what's causing the algae. Is there a reason why you can't do them every week? Because the more you change out on a frequent basis, the less excess nutrients will be available for the algae to feed on. Plus, your fish will really appreciate the cleaner water!
Imagine your kitchen and toilet are in your bedroom and you were stuck in there 24/7...would you mind the window being opened for some fresh air for only 20 minutes every two weeks?
You need to wash them in double dosed dechlorinated water after the bleach bath.
