Gallons and Finshttps://gallonsandfins.pages.dev/Aquarium calculators for real water volume, water changes, toxic ammonia from pH and temperature and label doses, plus guides to the nitrogen cycle.en-usAquarium Water Change Calculator for Nitratehttps://gallonsandfins.pages.dev/tools/water-change-calculator/https://gallonsandfins.pages.dev/tools/water-change-calculator/Wed, 11 Nov 2026 09:00:00 -0700Work out how big a water change you need to lower aquarium nitrate to a target, allowing for tap water nitrate, and what a series of changes achieves.Aquarium Volume Calculator: Real Gallons in Your Tankhttps://gallonsandfins.pages.dev/tools/aquarium-volume-calculator/https://gallonsandfins.pages.dev/tools/aquarium-volume-calculator/Wed, 11 Nov 2026 09:00:00 -0700Work out how many gallons and liters of water are really in your aquarium after the fill gap and substrate, for rectangular, cylinder and corner tanks.Aquarium Dosing Calculator: Scale Label Doses to Your Tankhttps://gallonsandfins.pages.dev/tools/aquarium-dosing-calculator/https://gallonsandfins.pages.dev/tools/aquarium-dosing-calculator/Wed, 11 Nov 2026 09:00:00 -0700Scale a water conditioner, fertilizer or treatment label dose to your aquarium's real volume, in mL, teaspoons, drops, grams or tablets, gallons or liters.Un-ionized Ammonia Calculator From pH and Temperaturehttps://gallonsandfins.pages.dev/tools/ammonia-toxicity-calculator/https://gallonsandfins.pages.dev/tools/ammonia-toxicity-calculator/Wed, 11 Nov 2026 09:00:00 -0700Convert a total ammonia test reading into toxic un-ionized ammonia (NH3) using your tank's pH and temperature, with UF/IFAS damage and danger levels.Testing Aquarium Water: Ammonia, Nitrite, Nitrate and pHhttps://gallonsandfins.pages.dev/guides/testing-aquarium-water/https://gallonsandfins.pages.dev/guides/testing-aquarium-water/Wed, 11 Nov 2026 09:00:00 -0700Which aquarium water tests matter, how often to test, how to get accurate readings from liquid kits and strips, and what the results mean for your fish.Making Tap Water Safe for Fish: Chlorine and Chloraminehttps://gallonsandfins.pages.dev/guides/dechlorinating-tap-water/https://gallonsandfins.pages.dev/guides/dechlorinating-tap-water/Wed, 11 Nov 2026 09:00:00 -0700Why tap water must be treated before it goes into an aquarium, how chlorine and chloramine differ, and how to find out which one your utility uses.Aquarium Water Changes: How Much, How Often and How Tohttps://gallonsandfins.pages.dev/guides/aquarium-water-changes/https://gallonsandfins.pages.dev/guides/aquarium-water-changes/Wed, 11 Nov 2026 09:00:00 -0700Why aquarium water changes matter, how to decide how much and how often from your nitrate readings, and a step-by-step routine for a safe change.The Aquarium Nitrogen Cycle: Ammonia, Nitrite, Nitratehttps://gallonsandfins.pages.dev/guides/aquarium-nitrogen-cycle/https://gallonsandfins.pages.dev/guides/aquarium-nitrogen-cycle/Wed, 11 Nov 2026 09:00:00 -0700How the aquarium nitrogen cycle turns fish waste ammonia into nitrite and nitrate, how long a new biofilter takes to establish, and what can disrupt it.