According to Rotala Butterfly, it agrees with what several of you have said, that I should indeed be dosing 2ml or even 3ml a day of TNC Complete. I think it suggests 2.5ml a day. Weoffer for sale macroalgae from our mature macroalgae mother colonies in a premium quality & 100% healthy within the UK and EU.

We won't be beaten on the premium quality of our live algaecultures, and surely not on the price either! TNC Complete is an aquatic plant food specially formulated for use in all planted aquariums. For aquariums where the fish load is not meeting the requirements to supply the necessary Nitrate and Phosphate – TNC Complete is ideal for making up this shortfall. So, taking an imaginary tank of 1,000 litres (i.e. 1,000,000 grammes), the 3x dosage of TNC complete would be 300ml weekly. Therefore our dosage contains the following:The amount of copper in TNC Completeis still so small that a overdose would be necessary before it would begin to reach an amount of Copper that is toxic toaquamarine life. Anyway, if you determine the compound (N,P,K, Fe, Mg) that's lowest in your water- it may well be potassium, then dose the amount you need to get to a good level of potassium for a few hours each day (it will go as/ if the plants use it) . I've have used and still use TNC and APT and both are good fertilisers. When I used TNC in a high energy tank however, I found I was using a lot more of it in comparison to APT so it was debatable how much money was actually being saved. For example, like @The grumpy one said, I was dosing several ml on a 5 gallon tank (can't remember the exact figure), but when I switched over to APT, I was dosing less than 1ml for the same results. In that scenario, a 500ml bottle of APT would have lasted 18 months, whereas the 500ml bottle of TNC would have been 6 months (at a 3ml/day dose). Where both get expensive is when using it for large tanks, which is why I use dry salts and mix my own for my 350L. If it were me, I would work out how many doses (I do it in days) you'll get from both fertilisers and see what's more value for money that way. For strongalgae growth it is recommended tomaintain a minimum Nitrate level of 3-5 ppm and phosphate level of 0.01 ppm, as otherwisean optimum macroalgae growth may not be possible.

I’m beginning to point the finger at fertilisation. I’ve been dosing TNC Complete, using the 3x dosage which supposedly approximates EI. But I’ve just done some sums, and I’m not sure it does. fertiliser compatibility - yes it's been talked about ever since Dennis Robert Hoagland started work on a combined fertiliser in the 1930's. You can find a few examples of fertiliser compatibility charts if you search on the internet. The primary reaction people fear in aquariums is that Fe EDTA will react with phosphorous in the presence of light. When an insoluble compound forms (like calcium phosphate or calcium sulphate) it prevents enough mobility to allow this to be taken up by plants. A problem that typically faces land fertigation is the reactions of certain ions with ammonia and sulphate salts. It is not a kit I've used, but if it goes red? It probably uses this method In which case one of the bottles will be an acetate buffer (sodium or ammonium acetate?) and the other hydroxylamine.TNC Complete includes 0.0002% Copper, which is 20 times more than in Seachem Flourish, whilst Brightwell's ChaetoGro does not include any Copper.

When a compound (a "salt"), like potassium nitrate (KNO3) is added to water, it becomes ions, a K+ and an NO3-. If we add potassium chloride (KCl) we get a K+ and a Cl- ion, there is no difference between the K+ ion from the KNO3 and the KCl, they are <" exactly the same">. Because of this we can use different salts to <" create fertilisers with differing nutrient content">. I use these as a guideline as it is lower nitrogen than full EI and that means I can clean my glass less often. Remember if you start by just dosing a little bit, you'll probably reach the ideal levels or higher for most of the elements. Try to dose the minimum to get to the ideal level of your most depleted nutrient (for me potassium).Is it possible that my plants are deficient in PO₄³⁻ or K? When I do water changes, I use about 10 litres of rainwater with 2 litres of tapwater to get the softness I want, so I’m not getting much contribution from the tap.