Algae Control: The Blackout Method
Looking for an easy way to hurt algae very bad? Ever heard of the blackout method? This technique is quite easy (and free), doesn’t stress the plants too much and really hurts the algae. This won’t fix the cause of your algae problem but at least, it will free your tank of algae while you are trying to fix the root cause.
Method
Step #1: Clean the filter a few days prior to procede with this method.
Step #2: Remove all the algae you can.
Step #3: Large water change (50-70%) and refill the tank without adding ferts
Step #4: Turn your Co2 system and lights off for the next 3 days.
Step #5: Feed the fish.
Step #6: Cover all sides of the tank. Make sure there’s no light in the tank. It should be totally dark in there.
Step #7: Leave the tank in total darkness for the next 3 days. No feeding of fert dosing during the blackout.
After The Blackout
Step #8: Open the light and have a look at your tank. After 3 days in total darkness, the plants might look a bit pale, no worry. There might be some algae left in the tank, we’ll take care of them later.
Step #9: Do another water change
Step #10: Add fertilizers and Co2 and wait 2-3 days. The light should be on during that period.
Step #11: If there is any algae left in the tank, repeat steps 1 to 7 again. You can keep doing this indefinitely until the algae gives up (they will). Don’t forget to do a good water change after each blackout
Popularity: 7% [?]
I do the same in my reef tank, though I don’t go as far as blocking off the sides. I have thought about it, but I’m pleased enough with the results of just leaving the lights off for 3 or 4 days. The tank looks refreshed, diatoms and other algae blooms subside, and I have never witnessed any negative effects to the corals or fish. Think of it as a storm, overcast for a couple days. I do this monthly.
Also, you can look at it as a way to reduce your aquarium costs. Last Earth Day I jotted down the 3 days of lights off per month, as well as other ideas to help save money and reduce impact on the grid and environment. I think the list and links can easily be applied or adjusted to planted freshwater tanks as well!
Green Reefing – Earth Day Thoughts
Hi! I never thought about doing this in my reef tank. I should give it a try!
Thanks for the tip