How many hours per day?

[eco]

My tank is 22uk gallons with approx 8cms of silver sand substrate, i have 2x 18w t8 plant growth tubes, a DIY C02 setup split between a bell disfuser and venturi via the filter exit pipe, i also use seachem flourish.

I have vallis, cryptocoryne,anubias, dwarf swords, and some java fern.

I currently have a small amount of green algae

My question is what is the optimum time to keep the lights on per day? im currently on from 12midday to 10pm

 

[foxfish]

If your tank is running smoothly & you dont have algae issues then leave them as they are - if have any issues then reduce the lighting.
It would be difficult to suggest the optimum lighting period for your tank but we use any thing from 5 - 10 hours & very occasionally 11 or 12.
I could guesse that the most common light up times are 7-8 hours.

 

[eco]

Thanks i think i going to knock it back alittle at a time 15 mins a week until i get to about 8 hrs my plants are getting out of control lol.