I have 3 of female CRS berried for 3.5 weeks, and expect to have some baby shrimps shortly. My tank is a small 5G tank with a lot of moss, and a big piece driftwood. I see my 10 CRS graze on the DW and moss all the time. But I find the tank glass is very clean even after a week. It seems there is no algae forming on the glass, rock (small one), and substrate (ADA decorative sand). I do not add fert. Plants look green, Nitrate is at 0. I know baby shrimp need to feed on algae and biofilm. How can I make more biofilm in my tank?
Keep in mind that algae and biofilm are different. Even if your glass looks clean, you most likely have plenty of biofilm unless you are just constantly razor blading all your glass, lol.
For leaves, they will go to town on them once they break down enough. I often have Indian Almond Leaves that take three to four weeks to break down enough. There are other benefits to the leaves as well, so I'd recommend leaving them in there
Other than that, something like Bacter AE will do well, but it's way too expensive for me to justify. Maybe a breeder who absolutely needs higher success rates, but I almost can't sell them fast enough to keep up already...
I have another 5G tank (same size) next to it with about 80-100 PFR shrimps. In that tank, there are lot of shrimp poop. Bio load is high. A lot of algae too. There is always a thin layer or surface screen in the tank. It breaks to small pieces if I pop it with my finger. I screen it out, and it forms again next day. Shrimps like to hang on the floating plant to eat the surface screen. Is the surface screen consider biofilm?