Brown Gunk In Tank

[dalios]

hi
 
I have a brown/green gunk build up over the last couple of days on my gravel, ornaments and fake plants even on the glass a bit and spray bar it has appeared rather quick.
 
I think it maybe the light is on too much i dont have a timer yet been needing to get one, sometimes the light is on for quite some time over 12hrs some points. I dont think its over feeding as i dont feed loads to my fish but dont give them hardly anything at the same time.
 
I will get a timer next week how long should i have the lights on for?
 
Thanks

 

[Ch4rlie]

Lights are generally kept on for between 6 to 10 hours, but this depend on what kind of lights you have and tank size, types of plants  and if you do ferts etc

 

[KieranBoyne]

Lights are generally on for around 10 hours a day as far as I know.

 

[dalios]

My tank is 180l 3foot juwel vision with 2 juwel high light bulbs. Think one is the day bulb and other is a nature bulb. Dont have any real plants there all fake. Will proberly just keep then on for 10 hours then. Thanks for the info

 

[KieranBoyne]

Anytime. Just scrub it off if you can and reduce light time.