running Co2 24/7 question

Hey guys,

I put my order in for the plants that i am going to be using in my 29 gallon planted tank im setting up, and i have a Co2 kit that i got from Petco, but there isnt really a practical way to turn it off at night. This setup is just temporary until I find a good deal on an Aquatek Mini Co2 paintball tank regulator with an electric solenoid built it so i can put it and the lights on a timer.

But my question is, since there is no practical way to turn the Co2 off every night with the regulator that came with the Co2 kit, i was wondering if i could keep it on 24/7 until im able to get a a regulator with a solenoid. Im not going to out any fish in the tank until i am able to get a Co2 regulator that i can put on a timer. To my understanding, leaving Co2 on 24/7 is only harmful to fish because of the PH swings that it causes and wont have any effect on the plants. Just making sure tho.

The plants that are going to be in the tank are:

Dwarf baby tear
Foxtail green (Myriophyllum Pinnatum)
Staurogyne Repens

for those interested, here is the 29 gallon tank that i am setting up. Foxtails in the back, baby tear lawn all in the front and middle and repens as a fill in between all the rocks on the sides

it's not a glorified diy setup, it came with a 48gram Co2 canister, regulator, check valve and a diffuser, but the regulator is very difficult to adjust, you gotta use a wrench and the most minute adjustment dramatically changes the flow of co2. it takes a good 5 minutes of fine adjusting to get the desired flow rate, so it's possible to turn it off, just not practical to turn it off every night and go through the process of adjusting the flow every morning when I turn it back in. so I was wondering if in the meantime, while I'm looking for a good regulator with a solenoid, can I leave it on 24/7 with no fish.

thanks huapala! I'm really looking forward to how this tank will turn out when it's all said and done. I ordered 36 stems of green Foxtail, 6 pots if s. repens and 7 pots of dwarf baby tears. the Fox tail Is going to be the background plant, baby tears will have a nice lawn in the middle and all along the front, and the S. Repens will accent the rocks on the sides. the plant order was $77 haha so it's quite a lot of plants. I'm going to switch the filter and heater to make that corner look better, and I'm going to get suction cups and anchor the line to the diffuser under the substrate and have it come out the back left corner, might also get black tubing.

I used 12 pounds of florite as the base and capped it with 40lbs of eco complete fine substrate. the goal is for it to pearl like crazy! I love seeing plants pearl!