Good system - but some general comments

Control valve and night shut in a made clever. Unlike the JBL ProFlora systems can be the Dennerle not easily converted as needed to disposable system - but for a quick prompt exchange has anyway a second full CO2 bottle handy, right? No matter what system is best for you exchange the CO2 supply these huge comic "Flipper", etc. equal to a small but significantly more effective CO2 ceramic membrane reactor.
Additional supply of oxygen as air stone or attached over water water supply can expel CO2 excessively and would therefore be counterproductive. But: In a well planted aquarium (70-80% of the surface area planted) is both superfluous anyway, since the plants provide a perfectly adequate oxygen supply - which is just as in nature and in the aquarium, so nothing new !! So Sprudelstein out and / or water supply just mount below the water level and directed slightly upwards, so remains a desirable constant movement of the water surface condition (good against scum), which supplied expensively CO2 but is so no longer expelled.
All this is Auqaristik basic knowledge and should anyone who operates mainly a planted aquarium, be known. In this respect, in ignorance not the manufacturers of such systems CO2 blame, a salesman in the shop should however point out quiet times.

CO2 systems - no matter welche- or activate an additional supply of CO2 can also generally completely avoid if you just called simply chooses to be maintained or undemanding plants that require no additional CO2 - even under these numerous varieties can be found very decorative plants and fish, it is not matter anyway.
More important than the actual avoidable CO2 supply is in well-planted tank rather an installed under the ground floor floodlights (weak floor heating - 10 Watt -), but not to heat the pool, but only to stimulate the circulation of water in the ground, which the plant growth and the Mulmabbau promotes - recommended is the "JBL ProTemp b10". The substrate should just then - so with Bodenfluter - but also more generally from a 3-4 cm layer soil (recommended is tropical laterite granules of "Dupla" or "amtra" mixed with 1/3 of the actual gravel) and 4-5 cm gravel (dark brown or matt black, rounded, 2-3 mm grain size) are made - not using a finer or coarser gravel and certainly no sand, there Bodenfluter then can not function. Heller ground stresses the fish and looks cheesy colored or unnaturally. Add to that a really effective and fertilizer system, eg "filtAS" -Langzeitdünger in net bag and then put the basket in the top of the external filter, enough for two or three months depending on whether T5 / T8 LED or lighting. A continuous fertilization is more advantageous than intermittent admit on certain days fertilizer. Then klappt`s well with the greens.