Hi,
Diurinal swings have always been small .1 to .2 even though I dose limewater 24/7 and not only at night. . I grow chaetomporpha on opposite photoperiod and dose most of my organic carbon during the day which probably mitigates ph swings and nightime hypoxia.
I'm more concerned about gettting ph to stay around 8.2.or at least peak there. Even though the 8.16 I have now is just fine and even the pre scrubbing high of 8.04 was probably just fine , I'd like to get to the standard nsw value 8.2 for the sake of form not necessarily substantive difference and to provide a better margin for any event that may drop it. I'm also curious about how I can manipualte ph with the scrubber.
BTW swings on reefs can run from 8.0 to 8.6.
Yes, I've seen where a number of people are using modified di canisters .Getting the air intake and output high enough to avoid air restriction to the skimmer venturi is important and easy with a plastic container,no fittings etc. Not as pretty though.
I have to wait a see if channeling of air flow resulting in uneven exhaustion of the soda lime varies with the jug I'm using vis a vis di canister results.. One fellow using a modified di cansister claims no uneven exhaustion.
I can put more media in my 1 g jug and make it deeper but wanted to start slow. I've got about a liter in there now.
The main point of the last post is that passing air through the soda lime does work even with a relatively small amount on a large system with a high bioload and lots of open well agitated water. Next I'll see how much is needed and how often it needs changing to get some handle on cost over a period of time.
I tried a soda bottle. Cut the bottom off and refitted it so it would come on and off for refill. Trouble is you need to have your air output tube in as wide a space as possible or the bottle will whistle loudly as I learned on a dry run. A container which is as or almost as wide at the top as it is at the bottom is much quieter. A larger cap is convenient too. I'm using a BRS 1 gallon container left over from an HC gfo purchase. I made another scrubber container out of a plastic juice container last night for skimmer no 2 and will be hooking that up once the Plumer' Goop, gases off( ie dries and is odorless).
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Tom
Current Tank Info: Tank of the Month , November 2011 : 600gal integrated system: 3 display tanks (120 g, 90g, 89g),several frag/grow out tanks, macroalgae refugia, cryptic zones. 40+ fish, seahorses, sps,lps,leathers, zoanthidae and non photosynthetic corals.
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