Plastic or vinyl chloride? I've seen CO2
personally eat through every tubing. With Silicone being cheap and could most likely hold a year, I decided to go with that as all I would have to do is get bottle caps to replace tubing. I have an extra check valve available when time is needed. I do have a question a bit off subject of this, with Iron ferts, how much ppm
iron is going in and what kind of iron. The reason why I am asking is I work for the local water department and I get my water from the source for water changes. They use iron chloride with one of there processes which would increase your typical iron content. I'm courious if I can get away from Iron supplementing. If I can't, what type of Iron could I get that would be most beneficial. If your answer is hard to explain due to the science behind it, please unleash as I have a strong background in all Chemistries.