Seasonal Pond & Water Feature Care

Since ponds are located outside, the activity of its inhabitants are directly related to the temperature of the pond at that specific time (i.e. during the warmer summer months the pond is a lot more ‘active’ than the cooler winter months).  For this reason any maintenance of a pond will vary according to the season.  It is then best to split this into the 4 seasons of the year as follows:


  • The busiest time of the year for any water gardener!
  • Start to feed any fish more regularly and change their diet to a readily digested type (e.g. growth food and normal sticks, flakes & pellets). To monitor this, the use of a pond thermometer is recomended
  • Regularly test your pond water (e.g. using Interpet Pond Health Kit) before you purchase any new or additional fish-keep testing throughout the year!
  • Remove any netting over the pond to clean off the winter debris – replace if required to protect your pond from predators!
  • Add new pond plants to your pond remembering to feed them throughout the year
  • Re-pot any old outgrown plants, especially water lilies, into new pond soil (e.g. Tetra Aquatic Compost) and always remember to put some additional plant food in (e.g. Hagen Pond Fertiliser Sticks). Use Hessian to line the baskets to help retain the aquatic soil, then dress the pots with aquatic gravel to secure the Hessian
  • Treat any fish diseases once the water temperature has risen above 12ºC (e.g. using Interpet Pond range of treatments). Temporarily turn off any UV clarifiers whilst treating (48 hours is adequate)
  • Clean out any filter systems on your pond or water feature remembering to wash any media in old pond water. Replace any exhausted or worn out media bit by bit over a few weeks.
  • Check for leaks and replace any damaged or blocked filter hosing. All filters must run 24 hours a day!
  • Add a biological supplement to kick start your filter back into action (e.g. Interpet Bio Start)
  • Add a supplement to aid the breakdown of any sludge on the bottom of your pond or feature (e.g. Interpet Sludge Buster)
  • Thoroughly hoover the pond or feature to remove any dirt formed over the past year (e.g. Oase Pondovac or Hozelock Cyprivac). This can be done on a regular basis throughout the year during the warmer months
  • Clean your pump thoroughly (e.g. using Interpet Pond Pump Cleaner) and replace any worn impellors or pre-filter foams. If in doubt, this is a good time to replace an unreliable pond pump
  • Ideally place the pond pump at the deepest point, as far from the filter outlet as possible, to ensure maximum water circulation and cooling
  • Replace any UV lamps and clean or replace the quartz sleeve that the lamp sits inside
  • Top up any water lost from your pond using an appropriate water dechlorinator (e.g. using Interpet Tap Safe)
  • If you require to ‘clean out’ your pond completely, now is the time – speak to a member of staff to get the right advice for your pond!
  • Watch out for signs of your fish and pond wildlife (especially amphibians) starting to breed – speak to a member of staff to find out the best way to raise any fry (baby fish) that may be produced.