Like many others, I use dried Oak leaves in my shrimp, crayfish and natural fish tanks. I discovered this trick with my betta and used it on gourami spawns as well. With the bettas, I introduce the male into the breeding tank two to three days before I add the female. As soon as I add the male I take one submerged Oak leaf from my shrimp or crayfish tanks and place it into the setup. I then continue with the sequence of adding the female in a clear container after the males has been there two-three days. In a few days when they are done spawning, the water will likely be slightly discolored, if not don't worry, and once free swimming you can observe the fry feeding on micro organisms. Same works for gouramis, just add the leaf when the breeders are introduced. I've also found that adding two-three resident ramshorn snails makes a huge positive difference as well.
I also use antaxanthin powder mixed with water helps stimulate the micro organisms and the fry consume it as well. These two things have totally replaced green water, I used green water for over 20 years and this is much more successful and easier. P.M. me if you have questions and good luck.
I also use antaxanthin powder mixed with water helps stimulate the micro organisms and the fry consume it as well. These two things have totally replaced green water, I used green water for over 20 years and this is much more successful and easier. P.M. me if you have questions and good luck.