Your fish will begin to become more active as temperatures begin to rise. After the relative hibernation of winter, fish can become weakened and it is important to support them by supplying the best possible water conditions. Start by reigniting the effectiveness of your biological filter by using products that host good bacteria and enzyme cultures like Bio Start and Brilliant Pond Tablets.
We would also suggest using a treatment of Stress Away and adding Pond Guardian Pond Salt to support your fish’s immune system as disease organism populations can respond more quickly than the fish to increasing water temperatures. If you notice any abnormal fish behaviour such as clamped fins, flicking or symptoms of disease, treat the problem promptly but also test your water to see if there is an underlying water quality issue.
As the pond temperatures begin to rise over 10oc you can start feeding your fish regularly again with good quality and easily digestible pond food. It can be hard to work out how much food your fish need, as a guideline give them as much as they can eat in about 5 minutes. If food is remaining after 5 minutes, remove it from the pond with a net.
Cut back the previous year’s growth early in March/April when new growth begins to appear. Start feeding with a good quality plant food, this is especially important for successful water lilies.
Plant foods like Flora Boost are specially formulated as low nitrate and low phosphate which will encourage healthy plant growth but limit algae blooms and green water problems.
Spring is also the time to introduce new plants to the pond, as this will give them time to establish in time for summer. Divide and re pot overgrown marginal plants to encourage variety and seasonal interest.
The increase in light and nutrients in your pond in Spring can often lead to an algae bloom or green water problems. Now is a good time to replace your UV lamp or add a UV to your pond to eliminate green water issues.
Ensure all dead leaves and plant matter is removed as the rising temperature will speed up their decay. Thoroughly clean your biological filter media in pond water and rinse or replace mechanical media such as: polymer wool and open cell foam.