It's been 4 weeks nice I added fertilizer. I put one 25 lb. Bag that i bought from greg. The first 2 weeks the secchi reading went from 36" to 31". Then one more week and it was at 27". I was thinking this was good so I didn't add anymore fertilizer. Now it's 18". I'm wondering if this will stop. The pond looks awesome and extremely healthy. Just worried that this won't stop.