1. I do not know if you have continued your 50% water changes. If you stopped after two weeks you need to begin those again. I am not a user of aquasoil, but I believe at the beginning aquasoil leeches a lot of nutrients into the water column, so you must keep up with water changes at the beginning.
2. If you are running 4 T5's you need to increase your CO2 saturation and increase your lighting period. With the amount of nutrients you have in your tank with the aquasoil and E.I ferts, you do not have significant plant mass to use the majority of those nutrients in a 5 hr period with that intense of lighting. So you have a lot of excess nutrients left over in the water column since you are only running your lights for 5 hrs.
3.So in my opinion you need to do several things. I would start by increasing my CO2 along with adding a couple hrs to your photo period and possibly turn off one aquaflora bulb. Continue with weekly or multiple weekly water changes.
Unfortunately you will have to experiment with somethings before you see results. There is not magic solution here. No one here can give you a definite solution to your problem. There is some trial and error. Start with what I suggested and tune your system from there.
I just realized you only have a HOB filter on your tank. You might want to add a powerhead or circulation pump to move the water around a bit more in your tank. It could help with algae prevention in the future.
2. If you are running 4 T5's you need to increase your CO2 saturation and increase your lighting period. With the amount of nutrients you have in your tank with the aquasoil and E.I ferts, you do not have significant plant mass to use the majority of those nutrients in a 5 hr period with that intense of lighting. So you have a lot of excess nutrients left over in the water column since you are only running your lights for 5 hrs.
3.So in my opinion you need to do several things. I would start by increasing my CO2 along with adding a couple hrs to your photo period and possibly turn off one aquaflora bulb. Continue with weekly or multiple weekly water changes.
Unfortunately you will have to experiment with somethings before you see results. There is not magic solution here. No one here can give you a definite solution to your problem. There is some trial and error. Start with what I suggested and tune your system from there.
I just realized you only have a HOB filter on your tank. You might want to add a powerhead or circulation pump to move the water around a bit more in your tank. It could help with algae prevention in the future.