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Help identify algae on substrate

lazybones51

Member
Joined
18 May 2017
Messages
258
Location
Northamptonshire
Aquarium
Depth: 42cm
Length: 70cm
Width: 40cm
Volume: 118L

Filter
Eheim classic 2217 filter
Spray bar running along the back length of the tank, pointing towards the front.

Lighting
Arcadia Stretch led light (600mm - 23w)
I've got this connected to a DIY Raspberry Pi controller (ReefPi), the photo period is charted below.
Screen Shot 2018-05-24 at 20.11.27.png

Dosing daily
5ml The Aquascaper liquid plant food
Maximum recommended dosage of easycarbo

I've had this tank running for about 18 months now and for the last few months I have been struggling to keep my substrate clean of algae. Previously I had a clown loach in there (came with the tank, which I was given by a relative), which used to constantly dig around in the substrate keeping it cleaner, however it also used to dig up my attempt at a staurogyne repens carpet, so I had it re-homed.

The staurogyne repens wasn't growing very well at all, I think this was down to a lack of light not helped by the depth of the tank. Because of it's lack of growth/sorry state and the substrate looking bad I pulled the lot out (which i'm now trying to grow emersed, who doesn't like a challenge :crazy:). After removal I syphoned out all of the affected substrate, I was also hoping the improved flow over the substrate might help with the algae, it hasn't.

I initially thought it was BGA, however it's not forming slimy "sheets"? It's got a blue/green colour too it, some of it's a darker green. Does any body have any ideas as to what it is, and what I can do to stop it?

The tank is looking bare now, however the remaining plants don't seem to be suffering with any algae issues. I've attached some photos.
 

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You do have sparsely planted tank with light reaching the bottom so with the clown loach gone there's nothing cleaning the gravel. Think the buildup of some algae on it is inevitable with the light planting. Some shrimp and/or snails should help to keep on top of it. More plants would help too.
 
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