RoShamBo

iTrader: (1)

Pond water has recently gone very very inky black from being quite clear - now cant see the fish!
Our filter (bucket filled with special stones - type) is really struggling to keep it clear.

Any ideas ? I put in some sludge buster yesterday, not sure how long that stuff takes to work ?

merlin24

iTrader: (1)

Something/one disturbed the silt on the bottom??
Might be worth getting a Water Test Kit and seeing what the Nitrate,Nitrite and PH balance is - might narrow it down a bit.

SVXNUT

Have you got a UV light filter built into the system, if not you may have a black algae infestation that this last week of sun has brought out.
Do not eat or let kids near the water without washing carefully after you have been in contact with it, it is poisonous, unlike the green stuff!!.
The fish should survive, but you need to carefully use an algae treatment from a watergarden specialist.