I'm redoing a couple of tanks and am going back to pressurized with in-line reactors. Most plants will be slower growers and moderate light (I'm going to about 70% peak on Fluval 3.0's with 24" deep tanks). Canister filters. Tank journal on these can be found here: https://www.plantedtank.net/forums/1...-makeover.html
I still have most of the equipment needed, but naturally couldn't find a few key components. I will update when I get a couple of mail order parts in later in the week and can get started. But in the meantime, I'd like to clear a few things up from this thread: https://www.plantedtank.net/forums/1...ement-use.html
keeps his stunning rainbow tank with CO2 levels I would have thought were lethal to fish, but at over 3 times the levels I always aimed for his rainbows are thriving. Now I'm wondering the value in a controller, drop checker, or charts at all. My tap comes out right at 3 dKH, 8 GH, 7.0 pH and 87 TDS. I do not currently have an RO/DI filter at home and have always used tap water for these tanks. Considering investing in a home RO unit and barrels so I can get KH to 1, but for the next several months at least, these are going to be kept with my tap.
The good news is that I have one tank with no fauna at all now, not even snails as far as I can tell. I'll get the other one there (or close) when I break it down in the next week or two. With no living fish or inverts, I won't have to concern myself much with over-gassing until I get it dialed in. If I can just drop pH one half point, I *should* be in the sweet zone by the chart's estimation.
After sitting in an open container with an airstone overnight, I have a KH of 3 degrees (from an API test, same as when measured directly out of the tap).
At a pH of 7.0 (out of the tap) I would have 9 ppm
At a pH of 6.8 = 14.3 ppm
At a pH of 6.6 = 22.6 ppm
At a pH of 6.4 = 35.8 ppm
At a pH of 6.2 = 56.8 ppm
At a pH of 6.0 = 90 ppm
Could I safely drop pH a full point with livestock in there? Intuitively I would think that with a canister that might be approaching the upper limits and it's because of wet-dry (and the O2 saturation it provides) that folks are able to pull these levels off. Is that a safe assumption? Finally, I'm considering a controller but it seems pretty shoddy to let it control both tanks while only reading one, even though they are virtually identical. Is that too crazy an idea? Thanks in advance for your insights.