Field guides (CO₂, algae, light, filters)

Field guides for CO₂, algae, lighting, and filtration — systems, not gadget lists.

Planted Tank CO₂ System Guide: When You Need It, How to Set Up, What to Buy

Aquarium Algae Control: Identify, Fix & Prevent (Field-Tested Guide)

Planted Tank Lighting Field Guide: Intensity, Photoperiod, Types & DIY

Best Aquarium Filters for Planted Tanks (2026): HOB, Canister, Sponge & DIY