Spring pond tasks
1Clean filter mechanical media (don't disturb biological)
2Restart UV sterilizer (replace bulb if 6+ months old)
3Begin gradual feeding when water consistently above 50°F (use cool-water wheat germ formula)
4Add plants - water lilies, marginals, oxygenators
5Test water parameters: ammonia, nitrite, nitrate, pH
6Inspect liner + plumbing for winter damage
7Remove leaf netting