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- - Seachem Flourish vs Tropica Plant Nutrition + (http://www.tropicalfishkeeping.com/beginner-planted-aquarium/seachem-flourish-vs-tropica-plant-nutrition-50878/)
Seachem Flourish vs Tropica Plant Nutrition +
Which one do you think is the best?
When considering this question, one also must consider the amount required. Not only from the cost perspective, but adding "stuff" to a fish tank should preferably be minimal to achieve the goal.
One-half a teaspoon, or 2.5 ml, of Flourish Comprehensive treats 30g. It can be used once or twice a week (this is determined by the response of the plants in relation to the light, fish load, water parameters).
According to Tom Barr, the botanist who formulated the EI (Estimated Index) system of fertilizing high-tech tanks, Tropica worked well when he used 5ml for a 20g tank three times each week. That's roughly six times as much as Flourish. Now, I don't know how "planted" Tom's tank was, but he considered my tanks (from photos) were lush and thriving, and I have been using Flourish twice a week for almost two years.
The other issue that enters into any such comparison is the type of planted tank; low-tech requires less, high-tech considerably more in the way of additional nutrients.
It will be high tech
pressurized co2, ph controller, co2 reactor, will be heavily planted and fully stocked with fish.
Now i am also considering TPN instead of the TPN+ since i will have nitrogen and phosphate from fish.
Seachem Flourish does have nitrogen and phosphate.
I have so far not come across any other product that has all necessary nutrients; the only two missing are oxygen (obvious why that isn't included) and nickel. I know of no preparation containing nickel, so either it is sufficient from somewhere (?) or it is not crucial.
Ok so I will try and get the Seachem Flourish. Also in heavily planted and fully stocked fish I should fertilize twice a week or more? Also how much ml should i dose for 450 litre tank?
Once or twice a week depens upon the plants, fish, parameters, light and using CO2. This is all relative within each aquarium. I've no personal experience with CO2 being added so I wouldn't hesitate a guess on frequency.
Ok will start the normal dose weekly if i see if this is not enough I will add twice weekly. How do you know if the plants need more ferts?
Algae is another guide; if it begins to increase beyond "normal" [and before you ask, "normal" is relative to each aquarium] light needs to be reduced, not nutrients. Light should be the limiting factor in plant growth, otherwise algae will always take advantage.
So if algae start i reduce time of lights and then should I ever increase timing. I am going to start with 10 hours light per day. 216W T5 for 450 litres.
Normally 12 hours is recommended with CO2. But if nutrients are not sufficient to balance the light, this could be too much light. Again, this is not easy to predict, because so many factors play into the equation.
Remember that algae will always be present; only when it obviously shows signs of becoming excessive should light then be reduced, and duration usually first. An hour can make a lot of difference. I went from 12 to 11 hours last year and algae slowed considerably. I still have algae of varing types, but it is not smothering the plant leaves.
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