hi

My 2 x 1.5 x 1.5(ard 100Litres) tank is on the following timing:

Additional info:
1]2 x diy fan to hover temp at ard 26-27DC
2]Dolpin external filter 500L/H BUT adjusted to half.
3]Xmas moss wall, Xmas moss on drfitwood, Erect moss on bogwood,Taiwan moss, RT Lotus, E.tennulus foreground, Crypto, MM & L.cuba
4]40 pcs C.tetras, 6 cherry bard, 40 malayan shrimps, 10 cherry shrimps, 3 white spot shrimps, 10 bee shrimps, 3 ottos.

5] Water change at 50% weekly. KH3 or 4, PH 6.6-7. Anyway, my co2 is always on the high side.

2 x 40 watt PL light & electronic pressurized CO2 on 2 different timer.

1] CO2 ON at 9am & Lights ON at 10am
(hoping to achieve enough Co2 dissolved in water column for Photosysthesis when lights is ON)

2] CO2 OFF at 1.30pm & Lights OFF at 2.30pm
(CO2 was cutted off 1 hr before lights OFF as it should have enough co2 for that 1 hr photosysthesis period)

3]SEISTA = 2.30pm to 5pm

4]BUT CO2 ON at 4pm & Lights ON at 5pm

5]CO2 OFF at 9.30pm & Lights OFF at 10.30pm

Q1] Will this method of turning CO2 ON 1 hour early before the lights is ON be better than both ON/OFF at the same time in term of plants photosysthesis...?

Q2] will there be sufficient co2 for my plants if i turn off the co2 1 hour before the lights off.(before that i have ard 4.5 hours of co2 injection already)

Q3] Is it necessary to have this method of on/off OR even the SEISTA?

Q4] Based on my tank spec, how much & how often must i dose the following :
A] Liquid fert from Dr malliack(recommended 10ML for every 100Lites)
B] Fe (powder)
C] Trace element (Powder)
D] CaSo4 (Powder)
E] KH3 (POwer)
F] KhPO4 (Powder)

Q5] & is it necessary to dose all A to F ?

thks