what leaves are these in your tank they make a nice looking feature but you may they leach inot your water and could increase nitrates too the safest bet on putting leaves into your tank would be almond leaves and alder cones they will bring otu a tea staining to the water too
Thanks for the comments. They are oak leaves I bagged a couple of years ago. I have enough to swap them out when they get mushy and start to break up. I like the effect of the light through them. I'm not worried about leaching as I am running peat in the filter. I'm not sure what to expect for nitrates in this tank with the peat filter and low lighting. I'm running about 6w of led lighting for about 4 hours a day. I'm really into the low light almost spot lighting look - the antibox of light. -Andy
its just one or two decent sized fully dried leaves. per week. end of the week pull em out and toss new ones in there. u can also get leaves online for your tanks. straight from the amazon and all natural. ur choice. either way pull em out more often then not.