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  1. Tom

    Water Hardness vs. CO2 diffusion

    Our water is seriously hard. I'm struggling to get enough CO2 dissolved in the Mini M (pushing 2bps), and was wondering how much difference there would be if I cut it 50/50 with RO when I start the 60P. Has anyone looked into how hard it is to achieve a set CO2 concentration in different levels...
  2. Tom

    Aren't needle valves supposed to close fully?

    I bought a needle valve from a company on eBay, along with a y splitter. It looks like pretty decent equipment, but I can't get the valve to shut off. I split the line from the FE I use for the Mini M, and set the valve up on my Do!aqua with a glass/ceramic diffuser. I completely shut the...
  3. Tom

    What can affect CO2 dissolving?

    What are the factors (apart from temperature) that could possibly affect how easily CO2 will dissolve in water or lower the availability to plants? Some say hardness can be a factor, some say outright it's not. I do find it interesting though that I had no CO2 issues at a GH of 1, whereas now I...
  4. Tom

    For those with UP regulator

    Do you find it unstable and hard to adjust? I'm trying to increase the bps to say 2.5bps, but within an hour it's back to below 2. Would a second needle valve help this and just leave the UP one open? I'm a bit worried for my week's holiday if it drops like that. Tom
  5. Tom

    Best Nano CO2 systems on a budget?

    I'm looking for a small CO2 system to run at maybe 1 bubble per 4 seconds 24/7 through a ceramic diffuser in the tank. I'm also on a tight budget, and I thought I'd see if anyone has any recommendations. I'd probably be looking at disposable canisters, but I want something that runs through a...
  6. Tom

    Excel - amount and stability

    Is the stability of Excel just as important as actual CO2? Also, how much Excel is too much? People talk about overdosing Excel, but never seem to give an amount. I've been dosing the recommended amount (about 0.2ml) in the cube but I started to get BBA on the Crypts. I've been increasing it...
  7. Tom

    How true is this ADA statement?

    How true is this statement from the online AquaJournals? From this, I understand that if the pH of the water drops during photosynthesis then there must be enough CO2 as the level of CO2 being injected is greater than that which is being used by the plants. This is assuming it's the carbon...
  8. Tom

    Drop Checker turned... Red.....!?

    I changed the liquid in my drop checker yesterday, and all seemed to be fine. It went from Green to Yellow as normal after changing, which is probably about right. This morning, however, it is bright red. Personally I've never seen a red drop checker before, so I'm assuming something is wrong...
  9. Tom

    Normal to lose pressure overnight?

    Hi all, I've recently started using the 2 gauge UP regulator with solenoid valve on my FE at about 1 bubble per 3 seconds (20bpm). I've noticed that overnight when the solenoid switches on, the pressure in the silicon tubing completely drops and it takes a couple of hours to build up again in...
  10. Tom

    Problem?

    Just now, I changed my normal airline for CO2 tubing. Before I had a solid 1bps, now I'm getting nothing for a few seconds, then about 10 bubbles in a go. I can't find it leaking anywhere. What have I missed? Tom
  11. Tom

    Cal Aqua's inline diffuser

    Does anyone have one?? Do they work better than the normal ceramic diffusers? They look pretty good from the description http://www.aquaessentials.co.uk/index.p ... ts_id=1370 Tom
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