Thread: I built a free mobile toolkit (Calculators for Ammonia, Salt, Volume, etc.)

Like many of you, I got tired of scribbling calculations on the back of envelopes or trying to find five different websites to work out dosing rates.

So, I decided to build a Koi Toolkit—a simple, mobile-friendly collection of calculators designed specifically for our hobby. It runs right in your browser (no app store download needed) and saves your settings to your phone automatically.

What’s inside:

Ammonia Safety: Instantly check if your TAN/pH/Temp combo is toxic.
Pipe Volume: Calculate exactly how much water is sitting in your pipework (Pressure & Waste).
Dosing: Precise calculators for Salt, KH (Bicarb), and Dechlorinators (ST & Vitamin C).
Bio Media: Work out how much media you need for your feeding rate. Energy: A quick estimator for running costs.
Volume & Trickle: Plan your water changes and total system capacity.

How to use it: Just click the link below. It works great on mobile—you can even "Add to Home Screen" to make it look like an app.

https://koipondtoolkit.uk/

It’s free to use, but if you find it useful, please consider buying me a coffee to help cover the time and upkeep. I built this to help the community, so if you spot any bugs or have ideas for a new calculator, please let me know in the comments!

Cheers, @widdz

Thanks Sam and Manky I appreciate it.

Manky. That’s brilliant. Would be great to have your expertise checking the calculations are up to scratch and in line with your knowledge.

Hopefully it came across in my post, but my vision is to bring all these resources under one, easy to use and more importantly mobile friendly platform. Allowing users old and new to the koi game an easier way to keep on top of everything koi pond related.

It sure looks good to me, nice one!!

I'd also like an app or something that records my weekly drop test readings, I have them written down on an A4 print out currently, but feel an app could help show patterns forming... anybody use something like this??

Watch this space. It’s something I’ve personally wanted too for a long time. It’s a lot more complex as I’ll have to serve a database / logins etc and then will have GDPR to contend with. But I’m looking into it / planning. It’ll have charts as well to be able to visualise the data over time.

Oooo that sounds awesome!! yes please keep us updated!

No problem Manky. Let me collate them and I’ll dm you

Thanks Manky.

ive addressed those comments. Thanks again for your time reviewing those ��

Hi bud. If you check out pro.koipondtoolkit.uk - I’ve finally built a web app you may be interested in. It’s taken a lot more work, but will hopefully give you that digital logging you’ve asked for

Originally Posted by dbs

It sure looks good to me, nice one!!

I'd also like an app or something that records my weekly drop test readings, I have them written down on an A4 print out currently, but feel an app could help show patterns forming... anybody use something like this??

Originally Posted by widdzuk

Hi bud. If you check out pro.koipondtoolkit.uk - I’ve finally built a web app you may be interested in. It’s taken a lot more work, but will hopefully give you that digital logging you’ve asked for

Hi,
Unsure if you've seen it, but I sent you a PM relating to a proposed collaboration with another app.

Would be interested in your thoughts.