About
Rotala Butterfly is a comprehensive, free online toolkit designed for planted aquarium enthusiasts who want precise control over their tank's chemistry and biology. The platform provides multiple specialized calculators including a Nutrient Dosing Calculator that supports popular methods like Estimative Index (EI), PPS Pro (Perpetual Preservation System), and PMDD (Poor Man's Dosing/Dupla Drops), as well as dose-to-target and result-of-dose functions. The Nutrient Accumulation Calculator tracks how nutrients build up and are consumed by plants over time, while the CO2/pH Calculator helps hobbyists maintain ideal CO2 levels (25–35 ppm) using the standard CO2/pH chart. A Light Calculator supports a wide range of fixture types including T-5, T-8, T-12, LED variants, Metal Halide, and CF bulbs. The Volume Calculator assists in accurately determining tank capacity. Beyond calculators, the site offers detailed guides on Aquarium Plant Deficiencies (covering CO2, Iron, Magnesium, Calcium, Boron, Nitrogen, Phosphorus, and Potassium) and an Algae Treatment & Prevention section addressing common problems like Black Brush Algae, Blue Green Algae, Green Spot Algae, and more. Rotala Butterfly is community-driven, currently in beta, and actively seeks contributors for language translations and calculation testing via its forum.
Key Features
- Nutrient Dosing Calculator: Supports multiple dosing methods including Estimative Index (EI), PPS Pro, and PMDD, plus dose-to-target and result-of-dose calculations.
- CO2 & pH Calculator: Uses the standard CO2/pH chart to help hobbyists dial in ideal CO2 concentrations between 25–35 ppm for healthy plant growth.
- Light Calculator: Covers a wide range of lighting types—T-5, T-8, T-12, LED (multiple brands), Metal Halide, and CF—for accurate lighting intensity estimates.
- Algae Treatment & Prevention Guide: Detailed guides on identifying and treating nine common aquarium algae types including BBA, BGA, Cladophora, and Green Water.
- Plant Deficiency Reference: Visual and descriptive reference for diagnosing nutrient deficiencies in aquatic plants across eight key elements.
Use Cases
- A planted tank hobbyist uses the Nutrient Dosing Calculator to determine the correct amount of fertilizer to add using the Estimative Index method.
- An aquarist troubleshoots yellowing leaves in their aquatic plants using the Plant Deficiency reference guide to identify a nitrogen or iron deficiency.
- A beginner sets up a new planted tank and uses the CO2 Calculator to ensure their CO2 injection is within the safe 25–35 ppm range.
- A hobbyist experiencing algae outbreak uses the Algae Treatment & Prevention guide to identify Black Brush Algae and find recommended treatments.
- An aquarium club website embeds Rotala Butterfly's Volume Calculator to help members quickly calculate their tank's water volume for accurate dosing.
Pros
- Completely Free: All calculators and guides are available at no cost, with a donate option to support ongoing development.
- Multiple Dosing Methods: Supports EI, PPS Pro, and PMDD in a single calculator, catering to hobbyists with different fertilization philosophies.
- Multilingual Support: Actively working to translate calculators into multiple languages, making it accessible to a global community of planted tank enthusiasts.
Cons
- Currently in Beta: The platform is still in beta, meaning some calculations or translations may be incomplete or require community verification.
- Niche Audience: Focused exclusively on planted aquariums, limiting its utility to a narrow hobbyist audience.
- No Mobile App: Available only as a web tool with no dedicated iOS or Android app for on-the-go use near the aquarium.
Frequently Asked Questions
What dosing methods does the Nutrient Calculator support?
The Nutrient Dosing Calculator supports Estimative Index (EI), EI Daily, EI Low Light/Weekly, PPS Pro, PMDD, dose-to-target, and result-of-dose calculations.
What is the ideal CO2 level for a planted aquarium?
According to Rotala Butterfly's CO2 Calculator guidelines, the ideal range is 25–35 ppm, with 30 ppm considered optimal for most planted tanks.
Is Rotala Butterfly free to use?
Yes, all calculators and information guides on Rotala Butterfly are completely free. The site accepts voluntary donations to support its development.
Can I embed Rotala Butterfly's calculators on my own website?
Yes, the site mentions an option to use their calculators on external websites. You can contact them via the forum for more details.
How can I help with translations?
Rotala Butterfly is actively seeking contributors to translate calculators into additional languages. You can get in touch through their community forum.
