Some of what I'm requesting applies to other mods that introduce H2 farms but can just apply to vanilla O2 and Algae.

I don't know if this is possible to do in a single block, but i would like the gas production farm and algae farm blocks to be unified in functionality so that no matter which block you choose they do the same thing.

Since finding out that Algae was a thing in the new update i found is mind bogglingly strange that they didn't just turn the older O2 blocks into a single thing since they are logically meant to use the same processes.

Yes I'm aware that the algae farm needs water, but in hardcore i think its find to screw the player over if they cant find a ice starter for the block. Maybe as a balance you could have an added component which is an water bottle made in the assembler from steel and ice. The logic being the block starts off with a pool of water for the algae to grow in and the need for water is only as a top up, so will have a very small requirement.

As for output ,maybe have them balanced so that they make a large amount of Oxygen, a fare amount of Algae and half or less that of hydrogen compared to Oxygen. The logic here is that Algae for what it is and with some minor tweaking can produce all the O2 and H2 (from the water the block should still need in small amounts of) you need with excess Algae as a biproduct.