Hello all planted aquarists. For all those that haven't seen my other questions, I'm still pretty new to aquatic plants, but not aquariums overall. After reading a lot of threads here and elsewhere, reading articles, etc, I've decided want to do some "moderate" Co2 supplementation. I have a 36 gal, aprox 28 actual volume. Moderately planted with vals, swords, ferns, anacharis, wisteria, & a couple "lily type" plants. Just upgraded the light to a Satellite Plus Pro. Using the pH/kH/Co2 calculators, I range between 7-12 ppm Co2. I know it varies based on time of day, lights on/off, etc. I "understand" that, but have yet to fully absorb when the values should be where.
But I want to get the daytime values up over 15ppm consistently. I'm not looking for show quality growth, this is more of a fish tank with plants as compared to a planted tank with fish if that makes sense. I just want a little boost. I have decided to go with a DIY citric acid system, with a diffuser. The questions I need answers to are:
This is a basic Co2 question. In any system you turn off at night, wouldn't this lead to daily day/night pH swings? And how risky is that to fish, if at all? Or is it not since the kH should stay the same?
For this type of system and what I am looking to do with it, I could use suggestions on the best diffuser? I am leaning towards the glass types, with the spirals.
Looking at this one (the 5 coil) specifically. Does this spiral actually improve the dissolution of the Co2, or is it just pretty to look at? And what are the lowest maintenance diffusers? I understand the ceramic plate will need to be cleaned regularly, but if one would need to be cleaned every 3 weeks instead of once a week that would be a plus. Or is there a better material than ceramic? I am not really interested in the ladder types, don't want to take up that much space in the tank.
The best bubble counters and check valves. They are both simple devices, and I understand how they work And they seem like they should almost all be the same. But I am sure they aren't and there are better versions than others.
Currently looking at this bubble counter that also has a check valve. If it is a decent bubble counter, would the check valve be safe enough, or would I best served to get another? And if so, what is a good check valve for a diy system? I've read the plastic ones aren't worth much, and the SS and brass ones I've seen, have had a few reviews stating that a DIY system has trouble creating enough pressure to get them to open consistently.
And any other opinions on equipment for a DIY system would be welcomed as well. THanks for reading and any advice.
Cheers,
Dave