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Hi All,

This is something I've been wanting to do for years, and I think I finally found a sensor that will work. I've always had trouble reading the API tests, and I've always been miffed that the reefers get the cool digital test readers - and wanted to take a crack at building one that could potentially read any freshwater test given a blank/known concentration as a calibration.




A sensor came out from ams (AS7343) in 2022 that unfortunately has been made EOL, but has a replacement (TCS34488M) with a similar package that might work for future versions.


I recently got my hands on a qwic version of the AS7343 sensor from sparkfun, and figured its time to put together something.

Goals:

• As cheap as possible
• Universal as possible
• Fit API glass/plastic vials (not sure yet if the plastic vials will read ok)
• Start with Nitrate/Phosphate and see if I can add more there

I figure I'll need 2 light sources (warm white, and IR for reading the phosphate test), but can use the same sensor array across most tests. I can use a small-form ESP32 as the MCU to give it USB-C power, wifi/bt connectivity if needed, and keep it small. Small/cheap ~1.3" OLED screen for displaying results/selecting tests.

Enclosure will be 3d printed.



First pass at a sketch - I might drop the screen if I can give the device a web interface though, which will make the device even smaller/cheaper, reduces the need for physical buttons on the unit, and a 2nd pcb entirely. Also not sure if it will need a cover for the top of the vial, or how much ambient light will affect the reads. TBD. Will order some XIAO ESP32S3 to play with and see how far I can take it.

I'll log progress here, and am very open to suggestions and ideas. If successful, I'll release the files so it can be easily replicated.

Time to start a new thread.

I’ll fill in some details later, but I’m working on the hardscape now. Any and all criticism is appreciated. The vision is nothing more, and nothing less, than something appealing to the eye.

90cm x 30cm x 30cm Lifegard Aquatics ultra clear bookshelf tank. Buce and anubias on the hardscape, stems towards the back and center, mid to front carpet with some changes in shade and texture down to a flat grade on the right side of the tank.

Lily pipe inlet and skimmer will be in the back left corner with the outflow in the front left to hopefully achieve circular flow. I’ll be running an in-line diffuser. Light will be the P600 Pro that I regrettably did not upside to 900. Oh well. I’ll mount it high and hopefully it’ll have enough spread.

I have some dragon stone and red lava rock rubble I’ll use at the base to blend into the substrate, as well as some stratum I may or may not cap with.

This is the future home for the announcements when someone obtains an achievement badge. Let the games begin!

Title

Sorry, but I just find this hilarious! Perhaps they'll ask scientists if there's a way to turn down the brightness and photoperiod of the sun.

Headline:

"Reflecting Pool woes: Trump administration turns to hydrogen peroxide in latest bid to beat back algae"​

Welcome to ScapeCrunch, @sarcopterigio!
We would love to get to know you. Please tell us about yourself. What tank do you have?

I have good nutrient, CO2 and light levels, why do my plants still grow poorly​

Many hobbyists spend time perfecting tank parameters, nutrient, light and CO2 levels, thinking that this automatically translates into optimal plant growth. While these factors are important, there are many other factors that affect plant growth.



For example above we have two groups of Lysimachia parvifolia growing side by side. Both groups have access to the same parameters, CO2, light, nutrients, substrate. However, the group on the right is growing poorly with darker, melting leaves and the group on the left is growing super vibrant red, with hardly a blemish.

This is not due to some arcane reason such as water flow hitting one group but not the other. The reason here is much simpler - the group on the right has been trimmed back repeatedly and allowed to grow in the same spot for a few months, while the group on the left was uprooted in the last month, divided and replanted. Overcrowding, both above and below the substrate, resulted in poorer quality new leaves being produced for the group of the right. This poor growth happened despite great growth parameters, a ton of CO2 and nutrients in the water column etc.

Different plants have different tolerances for overcrowding and aging. Some plant species regenerate well from repeated trimming cycles, others need replanting more frequently. Having great growth conditions delay deterioration of old growth, but most plants grow more optimally with regular replanting to clear congested rootzones and old growth.

Trimming and replanting cycles​

The exact number of trimming cycles each species can regenerate from, and the time it takes for old growth and root zone congestion to take effect is different for each aquarium environment. Generally, if aquarium conditions are more spacious, and there is more substrate depth and stable growth conditions, plants can grow in one spot longer. Stressful growth conditions, poor nutrient/CO2 levels and even poor microbial balance accelerate deterioration of old growth.

Interestingly, on the opposite end, overcrowding and root zone congestion also happens more quickly in fast growth aquariums. Hobbyists that throw a ton of nutrients and CO2 at their plants run headfirst into the brick wall that is overcrowding. This can be countered somewhat by using a portion of slower growing plants in an aquarium. The slower growing plants can be worked less often, while the fast growers are on a more regular replanting cycle.

Many aquascapers avoid stem plants because they require much more frequent replanting to grow well. Species such as Anubias, Bucephalandra and Cryptocoryne species on the other hand, have extremely long replanting cycles, and can grow for years without needing to be uprooted.



In this stem plant heavy aquascape that is around 7 months old, every single plant cluster has been replanted at least once. A sample of the replanting cycle for each species:

• Rotala blood red SG - every 4 months
• Rotala macrandra mini type 4 - every month
• Lysimachia parvifolia - every 2-3 months
• Xyris difformis - every 5-6 months
• Elatine triandra - every month
• Rotala florida - every 3-4 months
• Staurogyne purple - every 5 months

Uprooting, cleaning, replanting:​

To refresh stem plant bushes, we will replant the fresh tops of the plants, while discarding the older bottom portions.

The first step is to uproot the entire stem plant bush. To control the mess when pulling up the soil, we recommend using a water siphon to vacuum the area when pulling up plants. The siphon should be held very close to the point where the plant is being pulled up to catch the soil debris.

We will try to remove as much of the old root system as possible and also remove any organic debris that has accumulated in the area. While organic debris contributes small amounts of nutrients through decomposition, a build-up of organic debris will interfere with root formation for more delicate plants and will also trigger algae. To stir up the organic debris, we use a turkey baster to spray jets of water onto the substrate while vacuuming with a siphon. The aquasoil should look clean before we start replanting.


The next step is to sort the uprooted stems and select only the healthiest heads for replanting. (A) is a middle portion and already has several branches. It is a poor choice as it will give rise to very uneven growth. (B) is a weak cutting- observe how thin the stem is, and the lack of colour. If replanted, it has a lower chance of success. (C) is ideal. A thick, singular healthy top with healthy new leaves.

Enriching the substrate with new aquasoil​

When plants are uprooted, we can take the chance to enrich the substrate. There are two main ways to replenish depleted aqua soils. The first is to use nitrogen-rich root tabs. The second is to add fresh ammonia-rich aquasoil periodically. A good rate is adding 1% of new ammonia-rich aquasoil per month. For example, if you have 30kg of aquasoil in an aquarium, adding around 300 grams per month will work well. You can add new aquasoil during plant replanting cycles. Simply remove a portion of old aquasoil with a water siphon or spoon, then add and mix in the new aquasoil. This method may be cheaper than using root tabs in the long run



Replanting entire planted aquariums regularly is not feasible for most aquarists. So having an aquascape consisting solely of fast growing stem plants can be a nightmare when overcrowding and age sets in. Aquarists should plant a mix of slower growing species and species that do not need frequent trimming/replanting. Then the fast growing bunches can be replanted on a rotation basis - only one species is replanted during each weekly water change for example.Replanting work requires skill and dexterity. It is often difficult for beginners to manage, until some experience is gained. It becomes much easier with practice and time.

In this aquarium, Rotala florida, Xyris difformis, Syngonanthus species are all plants that can grow for months without replanting.



With consistent maintenance, aqua soils do not need to be replaced. The aqua soil in this aquarium is 1.5 years old APT Feast. Regular enrichment and clearing of detritus allows the substrate to perform like new. By renewing plant growth continually through replanting, and enrichment, planted aquariums also become more algae resistant.

This article is a slightly condensed version as I know folks don't like to be redirected, the full article can be found here:
Good parameters, Good CO2, Good light, Poor plant growth?

Welcome to ScapeCrunch, @Happy!
We would love to get to know you. Please tell us about yourself. What tank do you have?

Lesser Snipe submitted a new resource:

EU sources of micronutrients - Overview and compositional comparison of EU sources for micronutrient powders.

I've assembled a list of sources for micronutrient sources in the EU, especially in powder form. While this topic has been discussed some on for example the UKAPS forum, I couldn't easily find a comparison like this or even just a single source of dry micros available to me (from non-UK sources).

The list contains an normalized breakdown of the Fe, Mn, B, Zn, Cu and Mo (and others, where applicable) content, normalized to Fe for easy comparison. Mirconutrient content is color graded in each...

Click to expand...

Read more about this resource...

Hey folks, this marks the first time I've had more than one journal at a time, but I'm beginning work on a new 120x60 low-iron, rimless aquascape. I've been inspired by Hendy8888 and @Naturescapes_Rocco to try to make a really high quality stand. I have tried making a stand before, but it was a 2x4 stand with reclaimed wood facing, and it ended up looking pretty amateur. I'm trying to go high-end on this one in part because I want to be able to build cabinets for various projects around the house, and my wife will be less upset if I botch a fish tank stand than if I botch a new kitchen build.

I love seeing these stand builds, but they've always seemed somewhat under-documented to me. So this is starting from the very beginning - the design.

Under the influence of Rocco I did some 3d modeling for the tank. The pictures are a front view, one without the top sheet one, and one without the doors on. I used Shapr3d, which is free for one project. Let me know what you think of the design, and if there is anything I could work on!