09-30-2012, 12:26 PM
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Now that I have the tank dimensions, I can say that two tubes is moderate/high light. I only have one T8 [a Life-Glo] over my same-sized tank.
So that opens up the plant possibilities, but now we come to the fertilizers (nutrients). I've no experience with the named brand, and I tried to find out what is in the carbon supplement and can't. The reason some of us do not recommend liquid carbon supplements is because of the chemical they contain. Seachem's Excel and API's CO2 Booster, the two most widely available here in NA, both consist of Glutaraldehyde and water. Glutaraldehyde is a toxic disinfectant used in hospitals; it will kill some plants outright, and if overdosed will kill bacteria and fish. I don't know if this is in the EasyLife EasyCarbon, but I caution it might be.
Carbon occurs naturally in all fish tanks as CO2 from the respiration of fish, plants and bacteria, and (mainly) from the breakdown of organics in the substrate by bacteria. In low-tech setups this is sufficient, and we then aim to balance this with light and other nutrients via liquid comprehensive fertilizers. The info on the EL ProFito seems to fill this, so that product should be fine. There is no calcium, but this normally occurs in the tap water and is replenished via weekly partial water changes, assuming you have medium hard or harder tap water (which I believe is usual in the UK).
So where does all this lead us? You might manage to maintain the plants mentioned as redchigh and others suggested. Sometimes one just has to try a plant and see. Stay with what works. The light is fine, the nutrients aside from CO2 are fine. Limiting the light duration to balance the CO2 will keep algae at bay.