Yes, if you want to ensure that it remains chelated, it is stable to around pH 7.5. If you use a UVS, though, it will break the bond within a few hours. You can also use gluconate, such as Seachem iron, if you dose frequently. Many members mix DTPA and gluconate, since the gluconated iron is absorbed almost immediately.The PH is my tanks is never below 7, so should I be using Iron DTPA with my Micronutrient solution?