Hi, I purchased these hammers recently and today they are looking faded and a little droopy. What would cause the color loss? My ph is 8.0, temp 78, no ammonia, nitrite .20 (i added a rock to the mix a couple weeks ago) nitrate 5.0, and phos .25. Calcium is 480 and mag is 1450. I have a AI hydra 32. All other livestock looks good. Thank you in advance!