Hiya everyone, I bought a new 120L tank a few weeks ago and the light kept going off after a few minutes then eventually it wouldnt work at all. The shop changed the lid for me and the light worked for a few hours then stopped, if I changed plug sockets it worked for a while then stopped again, now it wont work at all. Im so confused. Is it the light or is it the socket? the filter and heater work in the socket. Ohhhhhh help please.