Notes on mathematics, research and other interests.https://www.danielcolquitt.comen-GBhttps://www.danielcolquitt.com/blog/estimating-nitrate-in-my-aquariumhttps://www.danielcolquitt.com/blog/estimating-nitrate-in-my-aquariumHow I use uncertain colour-chart readings to estimate nitrate concentration and its accumulation rate, and check the Gaussian approximation.Sun, 08 Nov 2026 00:00:00 GMTaquariumnitratemathematicsfilteringfishkeepinghttps://www.danielcolquitt.com/blog/modelling-nitrate-in-my-aquariumhttps://www.danielcolquitt.com/blog/modelling-nitrate-in-my-aquariumHow I model nitrate accumulation in my aquarium, accounting for water changes and uncertainty in the colour-chart readings.Fri, 30 Oct 2026 00:00:00 GMTaquariumnitratemathematicsfilteringfishkeepinghttps://www.danielcolquitt.com/blog/nitrate-in-my-aquariumhttps://www.danielcolquitt.com/blog/nitrate-in-my-aquariumMy first blog post: the aquarium, where nitrate comes from, and why I monitor it.Sat, 24 Oct 2026 00:00:00 GMTaquariumnitratemathematics