Fixed photo above, had a really red tinge and was rushing when I originally posted. I am also starting to see diatoms - and I can't tell if the water is actually clear or darker like the photo above (perhaps reflection of the contents?). Regardless... I'll be doing a 25% WC tomorrow. It's only been about 9-10 days since flooding (and the filter is still cycling). Last time I checked ammonia was at 8ppm+ (with API test kit). Edit// Water was actually a tannin-y colour, ended up being bothered by it and did a 75% WC. It's much clearer now... actually now that I think about it, it looks like the same colour as my nitrate liquid fertilizer. Since I'm still cycling, I have a feeling it's probably due to the conversion of all the ammonia -> nitrite -> nitrate.