Being an avid gardener, both in my yard and aquariums I fall victim to the trend of NOT introducing foreign chemicals into those two environments. Perhaps the Roundup scare started this trend and has impacted my aquarium keeping. Nonetheless I respect your research on this and the knowledge transfer to your followers. Right now I am experimenting with floating watersprite. The massive root clusters and spreading, floating foliage seem to do a good job of absorbing excess nutrients, dimming the lights on the bottom and in turn keeping the algae under control.

How does hydrogen peroxide affect nails and shrimp in your tank?

I've always used the peroxide when the lights were on, it really helps keeping hair algae in check, I still get it but next time I will try it as you recommend, with the lights off, thank for sharing!

I use hydron peroxide weekly to control algae. I turn off my light and pumps. And just like you said, my plants have started growing better. Thank you for the video

I can totally relate to what you went through with that strain of algae. I had it and nothing would help but hydrogen peroxide. As always thanks for all the info you put out there for us.

I love peroxide but for hair algae, if nothing eats the rotting remains you’re gonna grow more hair algae. And it’s hard to remove from substrate and rocks especially when you have a scape that can fall apart.

Nice talk, would a concern be prudent that a reduction in micro fauna could effect the Ram snails grazing habits and livelihood in the tank?

Thank you for your video Dr. I have a 4000 liter koi pond; about 1000 gallons; well filtered. Have been having problems with long brown algae because the pond is exposed to a bright sunlight. I have tried to grow emergent aquatic plants to absorb the nitrate, but it has not been working well because apparently the plants consume the Potassium and Phosphate from the water quicker, making them limiting the nitrate absorption. I'm still trying to dose these nutrients, but wary about hurting the fish. I want to try your method of adding H2O2. If you don't mind, can you confirm that the concentration of the H2O2 is 3%, and dosage you mentioned is 30ml/10 gallons? It comes out to about 3 liters/1000 gallons per day. Appreciate it, thank you!

Most articles I have read on dosing 3% hydrogen peroxide say to use 1.5 to 2 ml per gallon. Why did you use 3 ml per gallon or 30 ml for 10 gallons? I had a major outbreak of black beard algae and it took over my tank before I discovered using 3% hydrogen peroxide to treat it. The BBA was in all my decorations, plants and the glass and I figured I would give it a shot. I dosed 2 ml per gallon for 2 weeks and the BBA disappeared. I then added Florida Flag Fish to my tank as they eat BBA and it has been over a year and I have not had another outbreak. Every once in a while I see a tuft of BBA, but the Florida Flag Fish eat it before it spreads. Thanks for the great videos. If I had seen your videos a couple of years ago it would have been so helpful.

what was the first video?

"Gallons"... US or UK? What about using Liters, as a standard/generic measurement that crosses all language barriers?

For anyone that would be concerned with hydrogen peroxide all they need to know is that it turns into water when light hits it.. this is why hydrogen peroxide is sold in dark bottles

Hi, what would be the ideal orp reached by the dosing amount?

Also to prevent it from wiping out your good bacteria you might want to turn the pump off, spot treat the dose and wait for a few hours, then do a 50% water change before running the pumps again. 3ml/gal is way too high for 3% peroxide.

looks like h2o2 worked. i don't know what that algae is, it grows in tufts. the stuff i had was like it but black-green in color, i assume called black beard algae. i introduced a lot of ram(shorn) snails, at least 50 to this 20 gal long tank. first they cleaned every spot of green algae off the glass, in a matter of days. then they started eating the black-green tufts, as it was all that was left. it took at least a month, maybe 2, but they got rid of all of it. the only plant i have in the tank was christmas moss and it grew so profusely it filled the tank. there is some frog bit floating on the surface. i remove about half of the moss every month or so and donate to LFS. the snails crawl on it and clean it but not eat it. possible the moss competed with the algae for nutrients and won. now there are few snails left, i guess there is not enough algae to sustain a big population. the tank is 4 years old, and the snails have been in there 18 months or so. i change about 50% water twice a month, including vac'ing the gravel. old habit. it's forever an experiment. now water is clear, one airstone, no filter, and only 1 fish, a 20'' long black ghost knife. i have a 75 gal tank for him when i can get it set up.

Cool video. Can you use this dose in koi pond ?

What about my beneficial algae that I need for my, shrimp, Otos, & snails I feed these guys with my light.?

What's the dosing schedule for hydrogen peroxide? 1 Oz daily per 10 gallon?

How did the hydrogen peroxide treatment affect your shrimp and your snails in your aquarium?

A lot of these plants are grown in laboratories, where hydrogen peroxide and strong chemicals are used in order to disinfect them for tissue culture

Is it recommended to inject the hydrogen peroxide in the dark hours?

Sorry if I missed in this video I was wondering what type of pump you are using?

Im more concern what happened to cute Ranchus 😢