I currently have a 45 tall aquarium. I dry started S. Repens and MC in it. It ran for about 3 weeks, the repens were doing great, getting larger and a nice green color. The MC started dying off in chunks so I decided to flood at the three week point to try and save it, I had read somewhere that sometimes that works. So i flooded the tank, started CO2 on it the day after, gassed it pretty hard to make up for the deficiency and everything seemed good. Changed water 80% every other day. The repens took off, all of them were growing double in size each day, the MC started to look better as well. I was dosing, Flourish, and Seachem iron/phosphate. The tank health seemed to be doing really well. On the sixth day when I got home from work everything looked like it was dying, literally over the period of 15 hours or so. I thought that maybe it was just melting due to the transitional period but I am at day 10 and haven't seen any improvements. I'm kind of at a loss as to what is going wrong currently.
Substrate I used was UN Controsoil, I have root tabs throughout the aquarium, I have a fluval Aquasky on it. Photoperiod is 5 hours a day currently, CO2 comes on 2 hours before, I would rough estimate it about 40-45PPM for the CO2, I did scale it back slightly since I was going through a lot of it, probably about 60-65 when I first started it. Temp is at a constant 73-74 farenheit, running a Fluval FX4 and a Hydor Koralia positioned above the CO2 diffuser so I have a pretty strong flow to disperse things inside the tank. Anyone have some insight for me? Also excuse the setup, it's my first try at "scaping" if you can call this that lol I know it's not the greatest.
Water parameters are about the same since I flooded, been testing once a day:
PH 7.1, 6.4 when CO2 is on
Before, second day after CO2
10th day current status