Sorry, I wasn't clear on that... it's blue because the gravel is blue. I haven't started any type of cycling yet. All I've done is rinse the gravel and add water.
Thanks! I was afraid that all the sediment might mess up the filter.
I'll definitely be cycling! I won't be adding any fish until the end of the month anyway, even if it cycles well before then.
I am in the process of setting up my very first tropical tank (20 gallons). My problem is with the gravel. I rinsed it, let it soak, and rinsed it some more until the rinse water was clear, as far as I could tell. I put it in the tank, then started to add water. Apparently, and...