Ok now its changed a bit since I took this pic. The two plants on the left by the filter intake has been removed since they just didnt survive - lasted a week then they melted. Im still a noob when it comes to planted tanks but I love it. I cant afford flourite at the moment but am talking with my LFS to see if we cant make some sort arrangement (aka when he cleans his tanks to give me some of his peatmoss and flourite).
I also moved the one hairgrass to the back under the fake stump aswell. To cover the gap the plants made. My Vallis is mad tho, I had to take out about 6 offshoots this week alone that I gave to my fish store. It grows like a weed! Im waiting on them to get me a few other plants, and then I will add them in, especially since my bacopa is still struggling. As you can see Im just using plain gravel (river gravel that was sourced from a local farm - they rinse it well then sundry it before selling it to us fishkeepers.)
The sword in the foreground is my pride and joy tho. Ive had it about 2 months and its already 4 times the size it was when I got it.
As for the depth of the hairgrass, I suspect that differs from person to person. I am short :P So I couldnt get it in that deep, but mine seems to be happy so I dont mind, if you find that yours is doing better deeper I will bribe my brother with Jelly babies to get him to replant it for me :P
As for excel - I will just be following their instructions carefully.
On initial use or after a major (> 40%) water change, use 1 capful (5 mL) for every 40 L (10 gallons*). Thereafter use 1 capful for every 200 L (50 gallons*) daily or every other day. Dosing may be slowly increased in high-growth aquariums. For smaller dosing please note that each cap thread is approximately 1 mL.
I dont think it would have done that much harm except you fish might have suffered a lack of oxygen if you dont have just betta's in the tank. Normally you might have gotten an algae bloom from to much lights and excel and your fertz.
Lower your use of the excel. Only 1ml per day. I use a needle but its just because it is easier to get my dosages right. Altho with seachem I have heard there is no such thing as over dosing. If you feel that you did over dose - give it a day or two. Or else do a 25% waterchange and just add conditioner and not excel.