- Joined
- Jul 3, 2019
- Messages
- 50
- Reaction score
- 92
Basically I need to work out how much phosphates I have actually added to my tank in a very naive way.
Have had 0.0ppm phosphates on my Hanna Checker for 6 weeks and Nitrates have crept down to 1.0ppm started to see signs of dinoflagellate and had tried for a couple of weeks doing all the things you would tell some with high phosphates not to do. I read that food grade Potassium dihydrogen phosphate would be a good way to get some phosphate in the tank and boy did I.
I took 4 litres of salt water and added 4g of Potassium dihydrogen phosphate to it. I then measured this with my Hanna checker and I got a reading of 2.4ppm. so I thought ok, 2.4ppm divided by 4 gives me 0.6ppm per gram of Potassium dihydrogen phosphate.
10g of potassium dihydrogen phosphate into 1000l water would give me a reading of 0.006ppm so would probably take me 10 days to get to 0.06 as the desirable region. So I decided I wouldn't test until day 3 so that it would be detectable.
THAT IS WHERE IT HAS GONE HORRIBLY WRONG. Tested with my Hanna on day 3 and it just flashed 2.50ppm at me. I thought maybe just an error and testing again. Nope exactly the same. Realisation that the maths is wrong started to dawn on me. I have put X3 mixes of 10g Potassium dihydrogen phosphate with 500ml water in the tank.
I have picked up a Salifert test kit for Phosphate its way cheaper than trying to get a number on my Hanna. I also have started dosing Quantum Phosphate remover (lanthanum chloride) at 50ml for 1000 litre which is supposedly for tanks with 5.0ppm to 10ppm. Have done three doses so far and still at 3+ppm on the Salifert.
Can anyone calculate how much I messed up by in ppm so I can sort it? Have got my rowaphos reactor online too. Refugium lighting extended etc.
Have had 0.0ppm phosphates on my Hanna Checker for 6 weeks and Nitrates have crept down to 1.0ppm started to see signs of dinoflagellate and had tried for a couple of weeks doing all the things you would tell some with high phosphates not to do. I read that food grade Potassium dihydrogen phosphate would be a good way to get some phosphate in the tank and boy did I.
I took 4 litres of salt water and added 4g of Potassium dihydrogen phosphate to it. I then measured this with my Hanna checker and I got a reading of 2.4ppm. so I thought ok, 2.4ppm divided by 4 gives me 0.6ppm per gram of Potassium dihydrogen phosphate.
10g of potassium dihydrogen phosphate into 1000l water would give me a reading of 0.006ppm so would probably take me 10 days to get to 0.06 as the desirable region. So I decided I wouldn't test until day 3 so that it would be detectable.
THAT IS WHERE IT HAS GONE HORRIBLY WRONG. Tested with my Hanna on day 3 and it just flashed 2.50ppm at me. I thought maybe just an error and testing again. Nope exactly the same. Realisation that the maths is wrong started to dawn on me. I have put X3 mixes of 10g Potassium dihydrogen phosphate with 500ml water in the tank.
I have picked up a Salifert test kit for Phosphate its way cheaper than trying to get a number on my Hanna. I also have started dosing Quantum Phosphate remover (lanthanum chloride) at 50ml for 1000 litre which is supposedly for tanks with 5.0ppm to 10ppm. Have done three doses so far and still at 3+ppm on the Salifert.
Can anyone calculate how much I messed up by in ppm so I can sort it? Have got my rowaphos reactor online too. Refugium lighting extended etc.