Planted Tank Guru
Join Date: Jul 2008
Location: Morris County, NJ
Good, well-thought questions. A lot of this depends on your substrate. Are you using Aquasoil or something inert like sand? The latter means dosing is much much more important. If you have Aquasoil you have a lot more buffer room - the soil itself provides many nutrients, and is able to bind excess cations from the water. I don't think ADA adjusts fertilization based on trims but rather the general aging progression of the tank.
Of course the best way to set up an autodosing system to be able to make such changes in response to what the plants tell you is to have a separate pump for each nutrient (as opposed to a singular macro mix like many use) and mix rather dilute solutions. The timers that control these can usually be adjusted down to a minute basis, but with a very concentrated solution the volume difference from one minute (usually around 1 mL) can contain quite a concentration difference. Furthermore very concentrated solutions are at higher risk of precipitating at the end of the tubing (where the liquid gets dosed into the tank).
| BWAAAH IMA FIRIHN MA LAZER!!!!!!!!!
Last edited by Axelrodi202; 07-20-2016 at 02:13 AM.
Reason: added info