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Hi All,
I am using Aquaforest Substrate AF, which states that it is full of micronutrients and that I should not dose it for three months. Its been about 1.5 months and I seem to be getting some stunted growth despite dosing macros according to the Full EI regime as per the UKAPS calculator. In the past week I started dosing CSM+B as well (half dose) as I though I might as well give it a go. Everything else has stayed the same. CO2 is supplied and no algae is visible other than very small amounts of dust algae just before a water change is due. Any ideas? Look at the repens and the macrandra as well the crypt with its yellowing leaf.

1) Chihiros A601 (on the 4th brightness level out of 7). This is equal to about 3200 lumen.
2) DC is green bordering on yellow.
3) Filtration is a canister filter (Fluval 407) with Seachem matrix in every basket. This about 4.5 litres of the stuff.
4) Water change every single week. I change 30 litres exactly of the ±55 that is in there total.

One thing could be that the pH is still too high for the EDTA chelate to work properly as according to my research this chelate likes lower pH conditions.
 

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OK, a pen is handy since you want to know the PH difference and when it occurs and for fish safety as you don't want too much of a drop. Most aim for a 1.0 - 1.3 PH drop with co2 on.

It sounds like your doing everything right. I'm not familiar with the substrate, but regardless I would continue with full EI dosing both micro/macro. There's really very little downside to doing so as long as your changing the water as you are.

If the EDTA is a concern on your PH, there are micro mixes that have both chelating agents whether your water you ph is high or low.
 
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