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There seem to be 3 different patterns on the Sewellia. Some with stripes running along their bodies. Some more like blotches and others with a vertical stripe. Are they different or are they just variances?

It's fine. no problems. bought it in 2007 :)

Trouble with the Walstad book is that even Diana now uses circulation pumps or powerhead etc in her tanks. I run all my non CO2 tanks these days with a 10% weekly water change. Each with circa 1.2WPG LED. No major algae problems. The odd little bit of BBA or dusting on rocks but thats it...

It's not so much the CO2 that is in tap water because that will gas off very quickly hence why we are pumping CO2 in continuously and fighting to get enough to all parts of the tap before it gasses off. If we were talking about the CO2 in the tap water being the problem then we could simply add...

As you may know I just went from full EI with full pressurised and 50-60% weekly changes to..........nothing. The lights average (they are staggered anyway) went down to about 75% of previous average. The only thing that happens now is totop up daily 1ltr at most. and add some of my old EI...

This is part of the problem really. cheap or expensive is a relative term really. A CO2 system may look expensive but it will last for a long long time. You have to compare the expense of a CO2 system with the continual purchase of liquid carbon products. Over time the pressurised system...

no idea on activated carbon. I am not sure that it 'leeches' any carbon into the water. Nothing to really worry about though. You get it with the supplementation. However in the wild there is much more than decomposition taking place. The water even in a lake is moving everything around It...

The car analogy is a good one that we often use but you are looking at a more physical parts way of thinking. stay with cars but think more of putting enough petrol to drive 100miles at 50mph. Thats great. However if you suddenly decide to drive at 100mph You get most of the way and then run...

In a non CO2/low tech tank there is no need to introduce more CO2 naturally. That is the whole point. The CO2 is already there naturally. The substrate provides some from organics rotting down. The fish add some. Most importantly the 'natural' way CO2 enters the water at the surface to...

no problem. I am the the worst offender when it comes to generalisations ;) I would suggest (although I can't be sure) that none contain hoof and horn!!! Hoof and horn is used in other products but when an 80ltr bag is being sold for <£5 then costs are a major issue :) Virtually all the big...

I don't know where these 'impressions' spring from!!! Having worked in the industry and sourced the 'products' I can tell you that the nitrogen source is not whatever is the cheapest at the time. These products (at least from the major manufacturers) have fixed ingredients and are only changed...

Not really put off them. I've never really considered them. I won't say who I worked for as that could be libellous on my part but I can say that all the major companies 'fight' for the goods from the same sources!!! In many cases they buy up the sources to try and make it hard for the others...

Sorry for the late reply. We decided to stay in Sesimbra for 2 days and I have no internet access there :) Barrs method is basically the Walstad method without using the organic substrate and adding a little ferts to make sure there are zero defficiencies, nothing that different really...

I didn't say it supplied CO2 ;) It is a carbon source. Co2 is a carbon source. Plants take CO2, strip the carbon out and then release the Oxygen. Leonardite is a little like coal but a dust and just as some substrates provide a slow release of nutrients, the leonardite provides a slow...

I don't think it is 'diligence' nor any other thing that stops most people going with this method at all. The simple fact is that most (not all) aquascapers are after a pretty short term scape and that means hi-tec. As for the Walstad method I agree it is pretty straight forward however it...

I run a decent amount and have no problems although my non CO2 tank is only a month and a half old. It is however very small, open toped and gets top ups straight from the tap every couple of days. A lot of people tell us that equilibrium is 0.5ppm but as I understand it that is in sterile...

Not overly sure if it is due to the pressure!!! Just know that tap water is higher :) AC

Nope tap water contains much higher levels of CO2 under pressure. With non CO2 tanks that means the water is at equilibrium and then do a water change straight from the tap and you increase CO2. Means things are unstable. Water turbulence on a non CO2 tank is a good thing because it will...

Just degassing it for 24 hours should be fine. Put an airstone in it to make it quicker. AC

My thoughts are that either something is creating CO2 within the aquarium, which I doubt. The DC hasn't been changed for while and is showing other acids changing the Ph reading or that the initial 4dKH solution is wrong!!! The natural level in your aquarium would be about 3ppm before plants...

Reading the above I'll clear a couple of things up within it. It says that several manufacturers use the same recipe when in fact they dont. There are many John Innes No3 which is a trademark but it applies to the ratios of nutrient within it and not specifically to the type of ingredient that...

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I think the point is not algae but fish health. This is why EI has large water changes. If there is no risk and no need to test due to the high water changes. If there are no water changes then there is obviously risk and need to test. Makes common sense to me and I assume Ed is on the same...