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Presumably it doesn't degrade to anything harmful?

Does glutaraldehyde have a shelf life. I found some a the bottom of a box of aquarium junk that's likely 4 or 5 years old and am wondering whether it's worth using?

It comes up under Tropica's Easy collection, and I took that for granted. Maybe I'm onto Plan C.

I was contemplating trying Limnophila Hippuridoides, as Tropica reckon it's "easy". If liquid carbon isn't a simple solution I might resort to Plan C.

I'll take that as a big fat No!!! then. ;) Ok. Plan B ...

I'm aware of the algae and melt issues and am planning on swapping Vallis for Crypt Balansae as a result.

In the short term I'm contemplating something like Liquid Carbon. I've not seen it discussed whether you need to keep an eye on GH/KH/pH in the same way you do with CO2 injection, so am I right in assuming you don't? And is it easy(ish) to get the same red colouration of plants with the such...

I'm aware of that, but for the amount of CO2 I'm planning on getting through, space may be more of a consideration than money. Unless I can find a 1L FE.

Thanks very much. (They're also physically a lot smaller yet still refillable, which is a bonus.)

Can anyone tell me how litres of (Sodastream) CO2 equates with kg (for fire extinguishers)?

Ages ago I put an air stone in my (non CO2) tank when some of my fish got sick, in the hope that increased O2 would help them recover. I've never got round to taking it out. Although I know there are other reasons for my plants not doing as well as they could (and I will be making some other...

(m_attt - I was hoping you'd spot my question. ;) ) What hardware do you need to fill small bottles from large bottles? Do you need two regulators?

Paintball CO2 tanks are, as far as I can tell, about the most compact way to have a pressurised system. But They're going to need filling reasonably often. So here's a thought ... If you've got room in a garage for a larger cylinder but not under your aquarium, how about having both and filling...

Fair point about the size of your tank.

DIY shouldn't run the risk of flooding the tank with yeast as long as you have an inline non return valve. If you're good at DIY (including a little electronics) I reckon you should be able to knock up a timed shut-off valve for no more than £30. I've not seen it done, and it's not as...

Give me time Foxy. ;)

I'm not. Honest. :oops: There just seems to be an endless suply of people saying use pressurised CO2, and it was only after a lot of reading that I saw some one as respected as Tom Barr saying you don't have to do it that way. Of course you can, but the OP mentioned cost, and the cheapest CO2...

Have a look at the Barr Report website and look for the article on the low tech approach. (Sorry, don't have the link to hand.) It offers a different perspective on the "need" for pressurised CO2

:thumbup:

Thanks (again) Alastair. Might give it a try. Which brand did you use (and did you have any health issues using it)? JEK, the link didn't take me to the right thread this morning (on my phone) but seems to work fine now. (The grey text isn't part of my question, just potentially relevant...

I know pressurised CO2 is better than yeast or any of the liquid carbon souces. Please don't anyone suggest using it. I wouldn't be asking this question if it was an option. Right, got that out of the way ... My initial planting in my new low tech set up has not gone well (see my journal if in...

3'6" w / 2'6" h / 12" d

I take the point about a Koralia, but I'm trying to keep as much plumbing out of the tank as possible. I think hiding a small diffuser in the tank would be easier than a pump. I'd understood that the convention was to have the take-off pipe at the bottom of the tank and the return at the top...

I'm thinking more seriously about preasurised CO2. I was expecting to have the return pipe from the filter at the top of the tank and I'd like to use an inline atomiser/diffuser (so all the plumbing is out of sight and in the cupboard, not the tank). Because the tank is 2'6" high, will there be...

Steve, do you know what the capacity is and how tall it's likely to end up with a reg on top?

Are there any short, fat CO2 bottles? Something like 2kg that's about 18" including the reg? (From what I can see, FEs are too tall to fit under my tank and welding bottles too small to use without running out too quickly.)