Here are detailed recommendations for setting up a guppy tank, compiled from hands-on experience and key considerations:
I. Basic Setup Plan
Aquarium Selection
A 40cm ultra-clear square tank is recommended (with glass thickness of ≥5mm), costing around $7-9. It maintains water temperature more stably than smaller tanks.
For breeding, a 75cm tank with dividers (split into 4 sections, each 45×18×45cm) is ideal to prevent crossbreeding and disease transmission.
Filtration System
The Xinyou 380 sponge filter (used with an air pump) is top choice, as its gentle water flow won’t damage guppies’ delicate tails.
Fry tanks can use an 8-watt waterfall filter paired with quartz ball media to keep the tank bottom clean.
II. Key Environmental Arrangements
Substrate Selection
A bare-bottom tank is best, as it avoids waste buildup in substrate. If substrate is preferred, opt for crystal sand or volcanic rock—but increase cleaning frequency.
Plant Pairings
Floating plants (like water lettuce) and stem plants (such as hornwort or bamboo grass) work well. They provide hiding spots and help purify water.
Decoration Taboos
Remove all sharp objects and driftwood. Sharp decor can tear fins, while driftwood may acidify water—harmful to guppies.
III. Water Quality & Temperature Management
Keep water temperature steady at 22-28°C (heaters may not be needed in heated northern homes).
Replace 1/3 of the water weekly. Ensure the temperature difference between new and old water is ≤3°C. Tap water must be aerated for 6+ hours to remove chlorine.
IV. Special Setup for Breeding Period
Isolate pregnant females using a slotted breeding box or separate small tank.
Add dense bamboo grass clumps to the tank—fry can hide here, boosting survival rates.
Additional Notes
Avoid strong planted-tank lights. A basic blue-white LED light on for 6 hours daily is sufficient.
New fish must acclimate to tank temperature and water parameters gradually. Use methylene blue for quarantine to prevent cross-infection.