<prompt> Translate the following text to EnglishKwa kiasi kidogo cha maji ya kuhifadhi karibu 5 huondolewa kwa siphoning na kubadilishwa polepole kwa muda wa dakika 10 hadi 15.  <response>: All but a small volume of the holding water approximately 5 is removed by siphoning and replaced slowly over a 10 to 15 minute period with dilution water. 