Organic dirt layered with course sand and small pebbles on top.
Filter; AquaClear 20 with floss canister, 200 w heater and a Green Killing machine.
This tank was established in December 2014 with a canister filter and injected CO2. I have converted it to a low-tech tank to follow Diana Walstad's method.
My goal with this project is to establish a balanced ecosystem as Diana Walstad advises in her book, "Ecology of the Planted Aquarium"
I use 100% RO water remineralized with Seachem's Equilibrium.
I removed the canister filter 1 week ago and today is the first day without added CO2. I have changed the lighting from a high tech 10,000 K full spectrum LED light to a CFL spot light at 7000K and a 2700K LED, total WPG is 2
I have kept a journal for the last two months on PH, Ammonia, NO2, NO3, KH GH
These readings have been stable
Temp 79 deg
My lighting is on a timer of 12 hr a day. pins are set for "lights out" 10 -15 minutes through out the 12 hrs to naturally raise the CO2
CO2 is at 22 ppm at 2:24 pm without added CO2
My plants are heavy root feeders
I started to have a algae problem after I removed the canister filter . I have read from Walstad's book, that a iron level of .10 or higher can cause this so I have stopped adding flourish Iron for now to see if this is the problem.
I add 3 grams Flourish trace minerals twice a week and 15 grams of leaf zone once a week.
I will get better pictures after dark so you can see foreground better.