Survey of 33 gal on 32 weeks...

[Glouglou]

This is the link of a survey with concentration and general apreciation of plants on 32 week
11x17 inches, 528k, pdf...

Have fun!
http://www.grafcomm.ca/33gal.pdf

[fischkopp]

The ups and downs of a planted tank! 

WOW, did you measure this all by hand or did you run some kind of automatic test equipment (which probably dont exist for all the tests)? A very scientific approach, but helps a lot to understand whats actually going on the water.

Now I am just curious how the corresponding tank looks like. 

[Glouglou]

All the test was done with Hagen Tests, magnesium is find with the Ca test and GH test.

The tank Is all right (34 weeks) Crypts groing good as always, anubias (nana) coming back. I replace the Ludwigia that was reduce to a twig, Rotala coming back.

I will post a photos

THis tank will be tear down to try a nutritive bottom soil topped with high CEC Mix Turface, spiced with Laterite

Will post the new born photo....

[Glouglou]

Some notes on that survey...

The general problem was dying crinkle tips going down on Ludwigia. Smaller close node tips and slow growth on Elodea, rotala stop growing.

1— When ph go over 7.4 problem arise ( due to relation elements absorption/ph relation?)

2— Phosphor, Boron, Zinc, Copper, Manganese, Iron, absorption can be diminish.
Boron is the more immobile element and can bring or resemble Ca intake problem...

3— Kh is not a problem (only is relation to PH)

4— High GH seem to be related to the problem (Maybe higher MG or CA)

5 — Higher Ca and MG related to the problem

6 — NO3, PO4, Potassium and water change do not seem to have any effect on this problem.

[babblefish1960]

This is all great information Glouglou, I would be curious to know if you have similar graphing for other systems of substrate and fertilizers to provide a corollary of what could be considered a base line somewhere.

I have always believed that you can't grow potatoes in rocks, yet being slaves to a fertilizing regimen is counter-productive to relaxing around the old glass box and enjoying the scenery and fish.   Your testing could provide some clues as to a middle of the road compromise that works on its own satisfactorily, yet with minimal maintenance and interference.

Keep it coming Glouglou, I am enjoying your hard work.

[Aiglos]

I'm trying to take a break from work by browsing OVAS, and you throw this chart at us ? EVIL !!

[Glouglou]

I will repeat my evil deed with the same tank with a richer substrate and a different approach of dosing.



Substrate:Mix of generally Turface (for is high CEC) mix with a small amount of Soilmaster (mostly for color and some CEC) and Laterite in small amount to release small amount of iron to the soil all that on one inch of a mix of clay, soil, sand, calcite, laterite and some peat moss...

[fischkopp]

Whats is CEC? Just want to keep up ... 

[charlie]

Whats is CEC? Just want to keep up ... 

Cation Exchange Capacity , basicaly the higer the CEC # the greater the abilty the substrate has of holding nutrients for plant roots ( I think)