bettatester Posted July 2, 2021 Share Posted July 2, 2021 I know that crushed coral raises Ph over time. However, I was wondering how much does it ultimately raise the Ph? I know that different water conditions will effect this, but what might be a ballpark figure? For example if I need to raise a Ph of 6.5 to 7, about how long would that take? Would it get to 7? Would it stop at 7 when it got there? Link to comment Share on other sites More sharing options...
Colu Posted July 2, 2021 Share Posted July 2, 2021 If your pH is 6.5 and you want it to get to 7 I would add 100g of crushed coral in a media bag in your filter and should start see your pH going up after a couple of days Link to comment Share on other sites More sharing options...
DShelton Posted July 3, 2021 Share Posted July 3, 2021 On 7/2/2021 at 8:39 AM, bettatester said: I know that crushed coral raises Ph over time. However, I was wondering how much does it ultimately raise the Ph? I know that different water conditions will effect this, but what might be a ballpark figure? For example if I need to raise a Ph of 6.5 to 7, about how long would that take? Would it get to 7? Would it stop at 7 when it got there? That is a pretty tough question to give an exact answer to. It depends on a huge number of factors. The pH of the source water, % water change, frequency of water changes, KH, GH, plant load, and total water volume, just to name a few. The approach that @Colu listed above is sound. If you are starting with a slightly acidic solution start with a small amount of crushed coral/aragonite and give it a few days to adjust. As an example, I have a 30cm pea puffer tank with Fluval Stratum as the substrate and filtered with a matten 30ppi matten filter. When I cycled the tank with just plants and substrate, the pH of the tank was ~6.4 (source tap water is 8.2). Before i put fish in it, I added about 300grams of crushed coral in a filter bag behind my matten filter. Within 48 hours, the pH of the tank was ~7.2, and it has remained that for the last 6 months or so. 1 Link to comment Share on other sites More sharing options...
Leo2o915 Posted July 8, 2021 Share Posted July 8, 2021 On 7/2/2021 at 5:22 PM, DShelton said: That is a pretty tough question to give an exact answer to. It depends on a huge number of factors. The pH of the source water, % water change, frequency of water changes, KH, GH, plant load, and total water volume, just to name a few. The approach that @Colu listed above is sound. If you are starting with a slightly acidic solution start with a small amount of crushed coral/aragonite and give it a few days to adjust. As an example, I have a 30cm pea puffer tank with Fluval Stratum as the substrate and filtered with a matten 30ppi matten filter. When I cycled the tank with just plants and substrate, the pH of the tank was ~6.4 (source tap water is 8.2). Before i put fish in it, I added about 300grams of crushed coral in a filter bag behind my matten filter. Within 48 hours, the pH of the tank was ~7.2, and it has remained that for the last 6 months or so. So 4 a 40 gallon thats stays around 6.5 to 6.7 you think adding 3 table spoons to start and give it a few days ? Link to comment Share on other sites More sharing options...
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