Im not completely blaming it as i do feed a bit heavy but just coincidental. Thanks for your help BTW1 TDS for yo may be fuel for it and 1TDS for someone else may be inert stuff. Only way to know would be to send off a sample and get it tested. Too much effort and money for me lol. Thi si also why most usually recommend to change you di resing when you see 1 tds.
In addition, it may not even have been you being at 1 TDS. Lots of things can contribute to a cyano pop up.