Different ATS 2 different growths of algae

[atoll]

I have an A4 sized DIY waterfall ATS supplied by a Jebao 2000 pump and 2x 20w (run at around 14w) Chinese LED unit lighting the screen from both sides. LED units are made up of 4 blue 16 red leds.

My second ATS is a Santa Monica Surf2.

These 2 ATS's have been on about 2 montsh now

My Surf 2 is growing nice light green GHA nicely

My DIY waterfall is growing a much darker green more sloppy kind of algae.

So a few questions.

1/Why the different algae growth in each of my ATS's?
2/ Is it good to have 2 different types of algae growing?
3/ Should I increase the light in my DIY scrubber?
4/ Is my water flow enough?
5/ Is this tyoe of algae more to do what it is using feeding on in my tank water?
The screen grows this almost slime type algae across the whole screen.

My Last A5 size DIY ATS grew a very similar algae for a number of months before it started growing the lighter GHA well using the same LED lights.

Thank you.

[SantaMonica]

Probably is the light intensity. Water flow is almost never the issue; if it's growing dark, it's getting plenty of nutrients. Darker growth is not bad except it stops filtering sooner because of shading, and it lets go sooner.

Sound like to could increase lighting on them.

[atoll]

Probably is the light intensity. Water flow is almost never the issue; if it's growing dark, it's getting plenty of nutrients. Darker growth is not bad except it stops filtering sooner because of shading, and it lets go sooner.

Sound like to could increase lighting on them.

I have ordered 2x30w of the same 20w lights. The 20W ones I aready had worked fine on my smaller waterfall ATS so I think the 30w new ones will do the job better on this one.