I'm not going to speak for EK, but I haven't seen any major issues like there was 2 (3?) years ago with the older generation EK blocks.
Many people still use silver+distilled since then, but copper sulphate based algicides are probably best avoided. Personally I switched to EKoolant recently to cover any RMA discussions, and because it's non-toxic unlike other glycol premixes.
Many people still use silver+distilled since then, but copper sulphate based algicides are probably best avoided. Personally I switched to EKoolant recently to cover any RMA discussions, and because it's non-toxic unlike other glycol premixes.