CO2 is perhaps the most important nutrient in a planted aquarium. Shops offer Co2 kits that can be very expensive. You can make Co2 yourself if you have some time for much less money!
Do you have an ugly old tank or a leaker? Or just one that you don’t think will hold water? Learn how to seal it yourself in this DIY guide.
DIY emergency sponge filter. Make one in under 5 minutes! They will work fine for emergency’s but also for breeder tanks for smaller fish.