|Re: plants wont grow in the pond!!|
Subject: Re: plants wont grow in the pond!!
by EagleC on 7/6/2010 13:14:18
Sorry I've not been on in the few days but at least it looks like you've made some progress. With regards to the test results it appears that you have very little remaining nutrients in the water. The alkalinity could be explained by various chemicals entering the water, possibly leaching from the pots or washing in with rain water - off a roof, painted fence or concrete patio for example.
Tap water straight from the tap will often have temporary adjusters to get the PH close to 7.0 for drinking. Leave it 24 hours on a windowsill and then see what it is. The high phosphates in the tap water are not uncommon and will cause algae growth if left unchecked but rain water will have diluted that in the pond as you said.
I'd assume the fish are surviving on the food you add plus the odd insect that falls in. They wont be worried about the current water softness, the ph or the nutrient levels. Although if the KH or GH drop much more it could be a problem. You could probably feed them a little more as the extra waste will add to the plants nutrients. Ideally you'd want to maintain 5 or 10ppm nitrate and a trace of Phosphate.
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