Algae in an IBM system

[Tim Kelbert]

I started our system and slowly plants are taking off and the fish seem to be doing quite well. I just seemed to notice that algae is beginning to grow on the hydroton pebbles and in the tubes feeding the grow bed. Is this normal? It is in a greenhouse and a fan runs right above it. We live in wyoming where it is dry and the daytime temps are in the high 80's lower 90's. the ph level is at 7.5

[Alex Veidel]

Yeah, anywhere there is water and light, algae likes to hang out. It's fine as long as it doesn't get out of hand. A little algae on your growbed input and where the water splashes on the hydroton is pretty typical.

[Tim Kelbert]

Thanks, that relieves a little worry. What would you describe as to be out of hand?