Wiring advice/help needed (voltage in tank)

[GoFish]

Going out for drinks with some friends pretty quick, just had a glance at that article and you may have discovered the issue with one of Cardinal fish! HLLE?! I posted a while ago about it but never figured it out

Seen HERE

And just tested for current, 0

Thanks again for help, i'll reply when i have more time later on

Cheers