I just look
ed at your blog post and really enjoyed it. I just tried a dirted substrate based on MDs Fish Tanks and created a holy mess and couldn’t lower the pH. So I tore down that substrate removing the dirt and I tested all the individual components. Gravel, pebbles, sand, and dirt individually, but could not recreate the higher pH. So I put the gravel, sand and pebbles together added wood and plants and the higher pH reappeared. So I am now living with the higher pH in my second tank, a 20 gallon.
But I like your concept of worm castings and the egg crates. I just purchased a 5 gallon Marineland Portrait tank after watching Cory’s video on it. I was going to put my first Betta in it, but I can’t think he would be happy in that small of a tank.
He is currently in my 20 long community tank and doing very well. He is behaving himself with the other fish, cherry shrimp, and ramshorn snails. So I am happy to leave him be.