Koi Posted February 2, 2021 Share Posted February 2, 2021 Hi guys I've noticed a lot of people on this forum that either have some kind of chemistry/science background or are just incredibly intelligent. I've come to ask anybody that could fill in the gaps of my research or show me what I'm misunderstanding. To keep it short I am injecting co2 into my 65 gallon tank and I am using dry salts for fertilization. I have been creating solutions for a couple weeks now but have since reverted back to dry dosing since I suspect I am making a mistake in creating my solutions. Among other nutrient deficiencies It seems that I am lacking in iron. This is the part hopefully someone could better explain what I'm doing wrong or missing . I've been dosing 1/4 tsp Plantex csm + B 3 times a week. I've read that EDTA precipitates iron at ph of 6.5 and my tap water degassed is somewhere from 8.2-8.4. I have since stopped creating the solution and made two changes. I dose plantex dry 30 minutes before lights come on and my ph reads somewhere from 6.6-6.4 (the api test kits are kinda hard to read and probably not that accurate) and I supplement with .2ppm 11% DTPA fe. Ive included some pictures with closeup to show what I'm seeing Here are some of my tank parameters: Nitrate: 30-40 ppm most of which comes from my tap water and livestock I do add about 5-10 ppm with KNO3 Potassium: 25-30 ppm from KNO3,K2SO4 and KH2PO4 Phosphate: 4-5 ppm KH2PO4 GH: 7 dGH KB: 6dKH The ph of my tank is around 7.6 before co2 comes out When the light comes on ph stays around 6.6-6.4 the whole day As I said earlier I'm not sure how accurate these readings are since I usually watch my fish response but this is the lowest I can go before stress I'm noticing chlorosis and I see pinholes in older leaves of rotala hra. Because of how much K I'm dosing Im starting to think its because of poor substrate since I ran out of root tabs a month ago. I use eco complete The rotala macrandra is starting to look better, before I started adding DTPA it looked similar to the hra Link to comment Share on other sites More sharing options...
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