A tale of 2 tanks---or---running rodi for marine and Amazon River discus;

Sk8r · 09/18/2020, 02:08 PM

I have a nice setup for ATO (autotopoff) in which my ATO feeds from a monster ro/di tank (basement) and all was fine until we acquired a demanding freshwater tank (discus need a 6.5 ph in freshwater, which of course has no salt in it and does not want unscheduled minerals monkeying with the ph.)
So rather than cram another reservoir into our basement, I took a look at new equipment, and went with a Tunze Osmolator 3155 and its partner, the Tunze Calcium dispenser, smaller than a liter soft drink bottle. The beauty of this setup is you feed it calcium powder once a week, and in effect, it delivers the resulting kalkwasser (calciumwater) to your tank for stony corals and clams, and doesn't require a stirrer or reactor, or whatever, if Kalkwasser suffices for the calcium demand of your corals.

The Osmolator is an efficient autotopoff unit. That's its job. It can draw ro/di from my monster reservoir and mix it with kalk in the Calcium Dispemser, which sends calcium to the tank along with the regular topoff. IE, it's a calcium source that feeds in along with your reguilar topoff. Even better, it can use any calcium hydroxide, meaning even fairly economical Mrs Wages Pickling Lime. This means also that your ro/di reservoir stays pristine, available for any other ro/di use you have.

Neat development, easy use, small footprint.

09/18/2020, 02:08 PM	#1
Sk8r RC Mod Join Date: Feb 2006 Location: Spokane WA Posts: 34,628 Blog Entries: 55	A tale of 2 tanks---or---running rodi for marine and Amazon River discus; I have a nice setup for ATO (autotopoff) in which my ATO feeds from a monster ro/di tank (basement) and all was fine until we acquired a demanding freshwater tank (discus need a 6.5 ph in freshwater, which of course has no salt in it and does not want unscheduled minerals monkeying with the ph.) So rather than cram another reservoir into our basement, I took a look at new equipment, and went with a Tunze Osmolator 3155 and its partner, the Tunze Calcium dispenser, smaller than a liter soft drink bottle. The beauty of this setup is you feed it calcium powder once a week, and in effect, it delivers the resulting kalkwasser (calciumwater) to your tank for stony corals and clams, and doesn't require a stirrer or reactor, or whatever, if Kalkwasser suffices for the calcium demand of your corals. The Osmolator is an efficient autotopoff unit. That's its job. It can draw ro/di from my monster reservoir and mix it with kalk in the Calcium Dispemser, which sends calcium to the tank along with the regular topoff. IE, it's a calcium source that feeds in along with your reguilar topoff. Even better, it can use any calcium hydroxide, meaning even fairly economical Mrs Wages Pickling Lime. This means also that your ro/di reservoir stays pristine, available for any other ro/di use you have. Neat development, easy use, small footprint. __________________ Sk8r Salinity 1.024-6; alkalinity 8.3-9.3 on KH scale; calcium 420; magnesium 1300, temp 78-80, nitrate .2. Ammonia 0. No filters: lps tank. Alk and cal won't rise if mg is low. Current Tank Info: 105g AquaVim wedge, yellow tang, sailfin blenny,royal gramma, ocellaris clown pair, yellow watchman, 100 microceriths, 25 tiny hermits, a 4" conch, 1" nassarius, recovering from 2 year hiatus with daily water change of 10%.