Treating Blackbeard Algae with Hydrogen Peroxide

I can't directly answer your question as I would myself never resort to this treatment. My approach--and believe me, I have battled this particular algae more than once--is to work out the balance between light intensity/duration and nutrients for the plants. Once you have this, you will not see brush algae issues, I assure you--unless the balance gets off, as can occur with additonal daylight in summer or something. It may still be there, on wood, but it will not increase to smother the plants. I have achieved this by reducing light, and in other situations by reducing fertilization. I can explain more if asked. It is always safer for fish and plants and the system to resolve the cause rather than band-aid treatments that will likely not work long-term if the root issues are not corrected.

Byron.

cicrush13 said:

I will make the adjustments in my tanks, however I was gone for the last few weeks and it has gotten out of control in a few of them.
I am looking for a quick solution to help bring it back down under control while I modify my lighting and dosing and water currents.

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This being the case, it is even more important not to be adding unnecessary substances into the water. You want to restore the healthy biology, not increase foreign substances. Major water changes, with a good vacuuming of the substrate. Balance light and nutrients.

The algae that is there will remain, but the above will prevent it from increasing. This is also safer than attempting a massive die-off which will further aggravate things.

Byron.

I've spot treated with hydrogen peroxide using a syringe. An eyedropper or similar can work as well. Just squirt directly onto the algae.
I kept the total dosage to 2mm per gallon, so in your case you should be able to safely dose a total of 120mm of peroxide per day. I've heard of people dosing more that that but I try to err on the side of caution.

I usually take out the plants and other items that have BBA, put them in a bucket with a little tank water, and then treat with hydrogen peroxide, to make sure I really get the BBA.