Oh my god, is my 185 litre tank leaking?!

[StuffezLaYoni]

Eau or anyone, please help! I have a trickle of brownish water marks trailing down my wall from one corner of my tank! The other day it was dried, now it's damp and I can feel wet on the bit where I can squeeze my finger round the back of the tank. Could there be a leak?? What the hell do I do if its leaking? No visible cracks. I have dried the water bits with a cloth, so if it becomes wet again I will know there's a leak. I did a water change yesterday so am hoping it it cold have spilled.... But aware I'm clutching at straws :-(

[lurcherlover]

Can you mark the water level with a bit of tape or something then you can assess if it's going down?

[StuffezLaYoni]

Well it does go down gradually as it's a tropical tank and it slowly evaporates. Oh bollocky bollocks!

[EauRouge]

Could be, or could it be condensation dripping down? Try taking the lid off (if it's safe to do so) and see if it stops dripping.