Please choose the correct ending to complete the given sentence: Home and Garden: [header] How to grow spirulina at home [title] Get a tank. [step] Most home growers find that a standard size aquarium is perfectly adequate as a space to grow spirulina in. A tank that size will supply a family of four with plenty of spirulina.

Ending1: [substeps] You can grow spirulina in larger tanks, or even in a basin or pool outdoors (if you live in a warm climate). However, it will be easier to manage the spirulina culture indoors in a small tank. Ending2: Measure your tank out about 8 in (25.4 cm) by 1 in (2.5 cm) by 4 in (10.2 cm) square. Turn the fish pot inside out so it's small enough to hold spirulina. Ending3: [substeps] A minimum depth of 32 gallons (5.1 l) is common when it comes to spirulina, although different species may need more depth. The tank should be at least 50 gallons (120 l). Ending4: [substeps] See the tips below for further ideas on how size can be improved. [title] Get a comfortable, light plastic tank or plastic fish substrate.

Answer format: ending1/ending2/ending3/ending4