Carissa,

Yep, does smell like a swamp.............nasty......

All,

Thanks for the great advice.

Filters are cleaned regularly so good to go there..............

I plan on finally changing 40-50% of my gravel bed this weekend. I have 90 lbs of rinsed black flourite ready to go.

Based on the responses, my plan of attack is as follows:

Until the gravel swap is done beginning tomorrow or Friday:

3 day blackout with daily 50% wc with prime and gravel vac. I will see if I can get some excel at the same time.

That takes me to Sunday or Monday.

1. Swap 40-50% of gravel.
2. Perform at least 2 (or more) large 60-70% wc during the swap.
3. Clean all plants, trim and prune as needed. Replant only healthy uninfested stems. A lot of this was just done this weekend, so should be a bit easier.
4. Clean all wood, stones, etc well. Gravel vac the old side while all this is cleaning is going on.............
5. Increase N dosing to 3 tsp 3x per week.
6. Reduce light duration to 8 hrs per day.
7. Increase height of lights by 2-4".
8. Execute daily 30-50% wc for next 10 days with gravel vac of old gravel.
9. Investigate more current. Seems okay to me with plants swaying all over, but I guess another pump hidden away can't hurt. I have a 250 HOT magnum and an 1800 gph from the sump...........

See how all of that goes. Adjust as necessary.

Two weeks from now, I will replace the rest of the substrate. More daily wc until I feel the tank is not cycling in any way, which I expect with the swap.

Thanks again to all.

Will post developments.