aquabillpers;23926 said:I bet plain low nutrient topsoil under 2mm - 3mm gravel would work just as well if not better, and at a much lower cost.
naman;23931 said:ADA Power Sand is for keeping water circulation in substrate.
It is very porous, and pores are open, so you have a very big volume of Water under the main substrate. The more water volume in the base – the more water exchange through substrate preventing total anaerobic conditions = rotting and recharging top layers with high CEC. Easy to guess.
Layer of 1.5-2.5cm of lava stone is enough.
ADA Aqua Soil used as “nutrients delivery system” to roots – it has high CEC.
Substitue known for ~15 years – calcined clay (while not as convenient as AS).
BTW in lakes and rivers sand has no CEC, but mulm - YES.
In a tank mulm will quickly tern anaerobic or we have to wait for 6-12 months to build up enough mulm to feed plants, so we substitute mulm with gravel with high CEC, that’s it…
Plants delivering O2 with routes?
NO – planted 25% of substrate surface only(!).
Moreover, in the winter sometimes I have 17C in the room fro 2-3 mouths – no rotting.
Plants growth not worse than with ADA Power Sand + Aqua Soil. (proofed >10 years ago)
We can try to add “Rock phosphate” (apatite) also.
If tank is intended for 12-18 mouths only you can omit lava stone.
Do not use soil, cow/bull manure etc – it will rot.
Use earthworm castings as it is low labile organics (“almost” totally decomposed and will not rot, nor blow out with leaching nutrients in water column).
If you have a Brain and spend more time Thinking and Reading instead of saying “they are lying and making money, they are lying and making money, they are lying and making money…” you can Re-engineer virtually any product intended for use in a planted tank.
Most of them re-engineered decades ago and widely used.
For now I see: as for substrate system ADA never lied to customers.
The same is for their entire System of keeping a planted tank.
It is not just EI/PPS-pro (whatever you call this in fact ancient method) + Aqua Soil.
Why folks still spend $$$ on ADA's products?
They are still the best.
When you earn >$100 per hour you will not spend time on forums and in shops searching components for DIY.
I am not the one, so... I re-engineering
This is what folks say everywhere about ADA's products decades from now. Not me along.
Where I say pumice is giving CEC except circulation (doubtful for you)?Tom Barr;23937 said:CEC is of little concern, it's just pumice.
The clay in ADA aqua soil has far higher CEC than pumice.
Where I said depth is the ONLY factor?Tom Barr;23937 said:It's not based on the depth (anaerobic conditions), that can be a factor, but it's much more determined by organic matter, the reduced carbon. Bacteria cause the low O2, they need something to munch on and remove the O2, not depth of the sediment.
How is that? Once more, redox value depends on circulation too. If you have too much circulation (gravel 8-12mm, small deapth) you will never have low enough redox even with bacteria + organics. You will have too low redox if there is NO circulation due to very small grain size (1mm or less sand), or you have no live plants.Tom Barr;23937 said:but circulation is the not the issue, redox values are. This means flow and OM and plants roots, not just large grains and pore space alone.
…So once you realize that, and then understand the relationship to OM, then all this makes a lot more sense. Most of this is common sense.
Note: Please do not say “large” on 2-3mm gravel. Tank keepers refer to ‘large” when it is 5-8mm or even 8-12mm grain size. 2-3mm is the perfect size to have optimal redox, while you will not have it if there are less than 5cm layer + organics in sediments.Tom Barr;23937 said:ADA AS are quite large, about 2-3mm, plenty for circulation to occur.
Have you actually looked at ADA AS? The grain spacing is quite large.
This statement can be treated as I am wrong on replacement as organics has CEC, the same as ADA. We see that clearly.Tom Barr;23937 said:Lakes and rivers have a lot of clays, at least where we find high nutrients in sediments and plants. These do have high CEC. Mulm is organic matter.
I am talking on cases when folks put at the bottom of a tank 2-4cm of dried mulm as a source of nutrients for long periods, the same as 5cm and more of potting soil.Tom Barr;23937 said:No, this is not true, I've never had this occur in any tank. I've used many sediments and be doing this for 20+ years. Not once............
Where I suggested that??? Strange…Tom Barr;23937 said:Mulm is mostly for BACTERIA. Not a source of nutrients. If I want nutrients, I'll add nutrients.
Where I said this!?Tom Barr;23937 said:Do you honestly think bacteria grow and respire fast at lower temps or faster or the same rates?
YES, this is why I have already said pumice is a good “dilutioner” for organics – maybe ~50% by volume of a pumice is optimal. I also like very much that pumice+earthworm castings is very “loose” compared to plane gravel+organics – planty of place for roots (huge clumbs forms at the bottom of a tank).Tom Barr;23937 said:But it depends on HOW much you add.
No. You didn’t get something. It never totally seals - more, less, but not totally (with min.2-3mm gravel, less than 1mm will).Tom Barr;23937 said:Capping the top layer of PS with ADA AS effectively seals the layer down there. So it does not matter as much how big the powersand is.......
I DO know 90% of AS users do not use PS.Tom Barr;23937 said:I've never once had any anaerobic conditions in 20 + ADA aqua soil without powersand tanks. Not once. That's better than 95% confidence interval.
Well… place above PS plastic grid 5mm size used in construction – I think ADA have to tell it on the package of PS. Ugly!? Make a “cutting” along the front glass and place there AS…Tom Barr;23937 said:6. It does not make a mess when you uproot and looks ugly.
First you say NO difference… later no significant difference…Tom Barr;23960 said:There's no significant difference between adding it or not.
Did it years ago. Good reading (helps to grasp why there is no total anaerobic conditions when you still have alive plants, how Fe2+ and soluble iron forms etc.). And on Winogradsky column tests too, and AMF, and FTE etcTom Barr;23937 said:Take a good look at wetland sediments and the biogeochemical cycling. It'll help you to much better understand the topic.
Sure it is very hard to proof significant difference.